The style is either built in or you can download a CSL file that is supported by most references management programs.
BibTeX syles are usually part of a LaTeX template. Check the instructions to authors if the publisher offers a LaTeX template for this journal.
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
1. Smaglik P. The physics imbalance. Nature. 2002;419:3.
A journal article with 2 authors
1. Perera RM, Bardeesy N. Cancer: when antioxidants are bad. Nature. 2011;475:43–4.
A journal article with 3 authors
1. Ma H, Sun H, Sun X. Survival improvement by decade of patients aged 0-14 years with acute lymphoblastic leukemia: a SEER analysis. Sci Rep. 2014;4:4227.
A journal article with 7 or more authors
1. Cuevas CA, Notario A, Adame JA, Hilboll A, Richter A, Burrows JP, et al. Evolution of NO₂ levels in Spain from 1996 to 2012. Sci Rep. 2014;4:5887.
Books and book chapters
Here are examples of references for authored and edited books as well as book chapters.
An authored book
1. Pachamanova DA, Fabozzi FJ. Simulation and Optimization in Finance. Hoboken, NJ: John Wiley & Sons, Inc.; 2010.
An edited book
1. Walther C, Gupta DK, editors. Radionuclides in the Environment: Influence of chemical speciation and plant uptake on radionuclide migration. 1st ed. 2015. Cham: Springer International Publishing; 2015.
A chapter in an edited book
1. d’Andréa-Novel B, De Lara M. Continuous-Time Linear Dynamical Systems. In: De Lara M, editor. Control Theory for Engineers: A Primer. Berlin, Heidelberg: Springer; 2013. p. 97–131.
Sometimes references to web sites should appear directly in the text rather than in the bibliography. Refer to the Instructions to authors for Porcine Health Management.
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".
1. Government Accountability Office. Year 2000 Computing Crisis: Customs Has Established Effective Year 2000 Program Controls. Washington, DC: U.S. Government Printing Office; 1999 Mar. Report No.: AIMD-99-37.
Theses and dissertations
Theses including Ph.D. dissertations, Master's theses or Bachelor theses follow the basic format outlined below.
1. Zellner KM. An examination of grade distribution patterns and grade inflation at a baccalaureate nursing program [Doctoral dissertation]. [Minneapolis, MN]: Capella University; 2008.
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
1. Billard M. Sunsets and Pink Dolphins Along the Amazon. New York Times. 2014 Apr 13;TR12.
References should be cited in the text by sequential numbers in square brackets:
This sentence cites one reference . This sentence cites two references [1,2]. This sentence cites four references [1–4].