The primary reasons for citing sources in a research paper are to give credit to the authors whose work you have drawn upon and to allow readers to track down your sources, should they wish to explore further. There are many style guides for formatting citations and creating bibliographies. Many Animal Science professors ask that you use the format from the Journal of Animal Science, but you may be called upon to use others.
Peer reviewed journal:
Holehan, A. M., and B. J. Merry. 1985. Modification of the oestrous cycle hormonal profile by dietary restriction. Mech. Ageing Dev. 32:63–76. doi:10.1016/0047-6374(85)90036-3.
Johnston, S. L., T. Grune, L. M. Bell, S. J. Murray, D. M. Souter, S. S. Erwin, J. M. Yearsley, I. J. Gordon, A. W. Illius, I. Kyriazakis, et al. 2006. Having it all: historical energy intakes do not generate the anticipated trade-offs in fecundity. Proc. Biol. Sci. 273: 1369–1374. doi:10.1098/rspb.2005.3456.
Chapter in an edited book:
Bidanel, J. P. 2011. Biology and genetics of reproduction. In: Rothschild, M.F. and A. Ruvinsky, editors, The genetics of the pig, 2nd ed. Wallingford, UK: CAB International; p. 218–241.
McCaw, M. B., M. Turner, S. Jones, and K. Gambino. 1999. Maximization of farrowing house production. Proceedings of the North Carolina Healthy Hogs Seminar. Raleigh, NC: North Carolina Swine Veterinary Group, North Carolina State University.
The Journal of Animal Science uses CAS Source Index (CASSI) journal abbreviations. Use the Search Tool to determine the correct abbreviation for the journal you are citing.
In-text references or citations are used to acknowledge the work or ideas of others. They are placed next to the text that you have paraphrased or quoted, enabling the reader to differentiate between your writing and other people's work. The full details of your in-text references must be included in a reference list.
Energy restriction without limiting other essential nutrients has been shown to increase lifespan (Merry and Holehan, 2002) without compromising reproductive performance (Johnston et al., 2006) in several species.
When the author's name appears in the sentence, it does not need to be repeated in the citation:
Lean growth rates, feed intake, efficiency data, and rates of pubertal development of these gilts are described by Miller et al. (2011).