How to format your references using the American Journal of Science citation style

This is a short guide how to format citations and the bibliography in a manuscript for American Journal of Science (AJS). For a complete guide how to prepare your manuscript refer to the journal's instructions to authors.

Using reference management software

Typically you don't format your citations and bibliography by hand. The easiest way is to use a reference manager:

PaperpileThe citation style is built in and you can choose it in Settings > Citation Style or Paperpile > Citation Style in Google Docs.
EndNoteDownload the output style file
Mendeley, Zotero, Papers, and othersThe style is either built in or you can download a CSL file that is supported by most references management programs.
BibTeXBibTeX syles are usually part of a LaTeX template. Check the instructions to authors if the publisher offers a LaTeX template for this journal.

Journal articles

Those examples are references to articles in scholarly journals and how they are supposed to appear in your bibliography.

Not all journals organize their published articles in volumes and issues, so these fields are optional. Some electronic journals do not provide a page range, but instead list an article identifier. In a case like this it's safe to use the article identifier instead of the page range.

A journal article with 1 author
Mesirov, J. P., 2010, Computer science. Accessible reproducible research: Science (New York, N.Y.), v. 327, p. 415–416.
A journal article with 2 authors
Koppers, A. A. P., and Staudigel, H., 2005, Asynchronous bends in Pacific seamount trails: a case for extensional volcanism? Science (New York, N.Y.), v. 307, p. 904–907.
A journal article with 3 authors
Imaizumi, K., Shih, J. Y., and Farris, H. E., 2013, Global hyper-synchronous spontaneous activity in the developing optic tectum: Scientific reports, v. 3, p. 1552.
A journal article with 15 or more authors
Revankar, C. M., Cimino, D. F., Sklar, L. A., Arterburn, J. B., and Prossnitz, E. R., 2005, A transmembrane intracellular estrogen receptor mediates rapid cell signaling: Science (New York, N.Y.), v. 307, p. 1625–1630.

Books and book chapters

Here are examples of references for authored and edited books as well as book chapters.

An authored book
Morris, A. S., 2006, ISO 14000 Environmental Management Standards: John Wiley & Sons, Ltd, Chichester, UK.
An edited book
Steves, B. A., Maciejewski, A. J., and Hendry, M., editors, 2006, Chaotic Worlds: From Order to Disorder in Gravitational N-Body Dynamical Systems: Springer Netherlands, Dordrecht, XIV, 342 p p.
A chapter in an edited book
Campadelli, P., and Casiraghi, E., 2005, Pruning the Nodule Candidate Set in Postero Anterior Chest Radiographs, in Apolloni, B., Marinaro, M., and Tagliaferri, R. eds., Biological and Artificial Intelligence Environments: 15th Italian Workshop on Neural Nets, WIRN VIETRI 2004: Springer Netherlands, Dordrecht, p. 37–43.

Web sites

Sometimes references to web sites should appear directly in the text rather than in the bibliography. Refer to the Instructions to authors for American Journal of Science.

Blog post
Davis, J., 2016, India Ratifies Paris Climate Agreement, Bringing World Closer To A Binding Deal, accessed October 30, 2018, at IFLScience at


This example shows the general structure used for government reports, technical reports, and scientific reports. If you can't locate the report number then it might be better to cite the report as a book. For reports it is usually not individual people that are credited as authors, but a governmental department or agency like "U. S. Food and Drug Administration" or "National Cancer Institute".

Government report
Government Accountability Office, 2008, Surface Transportation: Principles Can Guide Efforts to Restructure and Fund Federal Programs: U.S. Government Printing Office GAO-08-744T.

Theses and dissertations

Theses including Ph.D. dissertations, Master's theses or Bachelor theses follow the basic format outlined below.

Doctoral dissertation
David, S. Z., 2016, A Practical Approach for Formation Damage Control in Both Miscible and Immiscible CO2 Gas Flooding in Asphaltenic Crude Systems Using Water Slugs and Injection Parameters:

News paper articles

Unlike scholarly journals, news papers do not usually have a volume and issue number. Instead, the full date and page number is required for a correct reference.

New York Times article
Vecsey, G., 2010, Empty Gray Gives Way to Blues and Boos, Just Like Before: New York Times, p. D7.

In-text citations

References should be cited in the text by name and year in parentheses:

This sentence cites one reference (Mesirov, 2010).
This sentence cites two references (Koppers and Staudigel, 2005; Mesirov, 2010).

Here are examples of in-text citations with multiple authors:

  • Two authors: (Koppers and Staudigel, 2005)
  • Three or more authors: (Revankar and others, 2005)

About the journal

Full journal titleAmerican Journal of Science
AbbreviationAm. J. Sci.
ISSN (print)0002-9599
ISSN (online)1945-452x
ScopeGeneral Earth and Planetary Sciences

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