Providing citations to the work of others you use to create your paper shows that you are using information ethically and honestly. Citing sources gives credit where credit is due and provides readers with a trail of breadcrumbs, which they may use to learn more about your topic and to follow your line of reasoning. Also, citing your sources shows that you have done the work and respect the intellectual property of the people you cite. Each academic discipline tends to have its own separate citation style, often modeled after the core journals in its field. For example, Dr. Downing publishes in the journal Ecology and uses the style seen in the reference section of their articles. While CSE is the citation style most frequently used in the biological sciences, you may also use the style recommended by Dr. Downing as the same one used in Ecology.
The CSE Style Guide, prepared by The Ohio State University Libraries, gives clear examples of how to prepare citations for your paper. Examples of in-text and reference list citations are given.