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
Gershon D (2002) Malaria research tools up for the future. Nature 419:4–5
A journal article with 2 authors
Jupp T, Schultz A (2000) A thermodynamic explanation for black smoker temperatures. Nature 403:880–883
A journal article with 3 authors
Misura KM, Scheller RH, Weis WI (2000) Three-dimensional structure of the neuronal-Sec1-syntaxin 1a complex. Nature 404:355–362
A journal article with 5 or more authors
Fritzsch B, Piatigorsky J, Tessmar-Raible K, et al (2005) Ancestry of Photic and Mechanic Sensation? Science 308:1113–1114
Books and book chapters
Here are examples of references for authored and edited books as well as book chapters.
An authored book
Gordon ME (2009) Trump University Entrepreneurship 101. John Wiley & Sons, Inc., Hoboken, NJ
An edited book
Soccol CR, Brar SK, Faulds C, Ramos LP (2016) Green Fuels Technology: Biofuels. Springer International Publishing, Cham
A chapter in an edited book
Bai H, Wang A, Zhao Y, et al (2011) Algorithms of DVC. In: Wang A, Zhao Y, Pan J-S, Abraham A (eds) Distributed Multiple Description Coding: Principles, Algorithms and Systems. Springer, London, pp 115–164
Sometimes references to web sites should appear directly in the text rather than in the bibliography. Refer to the Instructions to authors for Topics in Current Chemistry.
Davis J (2016) Scientists Claim To Have Reversed Menopause. In: IFLScience. https://www.iflscience.com/health-and-medicine/scientists-claim-to-have-reversed-menopause/. 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".
Government Accountability Office (2012) ADA Paratransit Services: Survey of Public Transit Agency Officials on Services and Costs (GAO-13-18SP, November, 2012), an E-supplement to GAO-13-17. U.S. Government Printing Office, Washington, DC
Theses and dissertations
Theses including Ph.D. dissertations, Master's theses or Bachelor theses follow the basic format outlined below.
Ray SJ (2017) Departmentalized Classroom Environments Versus Traditional Classroom Environments in Second Through Fourth Grades: A Quantitative Analysis. Doctoral dissertation, Lindenwood University
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
Sisario B (2016) Green Day Is No. 1. New York Times 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].