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. Moltz JC. Technology: Asia’s space race. Nature. 2011;480:171–3.
A journal article with 2 authors
1. Michaels D, Wagner W. Science and government. Disclosure in regulatory science. Science. 2003;302:2073.
A journal article with 3 authors
1. Navarro-González R, McKay CP, Mvondo DN. A possible nitrogen crisis for Archaean life due to reduced nitrogen fixation by lightning. Nature. 2001;412:61–4.
A journal article with 7 or more authors
1. Ahmed MF, Ahuja S, Alauddin M, Hug SJ, Lloyd JR, Pfaff A, et al. Epidemiology. Ensuring safe drinking water in Bangladesh. Science. 2006;314:1687–8.
Books and book chapters
Here are examples of references for authored and edited books as well as book chapters.
An authored book
1. Lincoln NB, Kneebone II, Macniven JAB, Morris RC. Psychological Management of Stroke. Chichester, UK: John Wiley & Sons, Ltd; 2011.
An edited book
1. Sarkar P, Iwata T, editors. Advances in Cryptology – ASIACRYPT 2014: 20th International Conference on the Theory and Application of Cryptology and Information Security, Kaoshiung, Taiwan, R.O.C., December 7-11, 2014. Proceedings, Part I. Berlin, Heidelberg: Springer; 2014.
A chapter in an edited book
1. Solomakhin R, Tsang P, Smith S. High Security with Low Latency in Legacy SCADA Systems. In: Moore T, Shenoi S, editors. Critical Infrastructure Protection IV: Fourth Annual IFIP WG 11.10 International Conference on Critical Infrastructure Protection, ICCIP 2010, Washington, DC, USA, March 15-17, 2010, Revised Selected Papers. Berlin, Heidelberg: Springer; 2010. p. 63–79.
Sometimes references to web sites should appear directly in the text rather than in the bibliography. Refer to the Instructions to authors for BMC Obesity.
1. Andrew E. What happens When A Python Tries To Swallow A Porcupine? IFLScience. 2015. https://www.iflscience.com/plants-and-animals/punctured-python-found-dead-after-swallowing-plump-porcupine/. Accessed 30 Oct 2018.
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. Surface Transportation: DOT Is Progressing toward a Performance-Based Approach, but States and Grantees Report Potential Implementation Challenges. Washington, DC: U.S. Government Printing Office; 2015.
Theses and dissertations
Theses including Ph.D. dissertations, Master's theses or Bachelor theses follow the basic format outlined below.
1. Donohue J. Resolving Past Liabilities for Future Reduction in Greenhouse Gases; Nuclear Energy and the Outstanding Federal Liability of Spent Nuclear Fuel. Doctoral dissertation. George Washington University; 2010.
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. GEORGE GENE GUSTINES; Compiled by DAVE ITZKOFF. A Cartoon Depiction of Real Iranian Life. New York Times. 2010;:C2.
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].