Citing the ideas and work of others is an integral part of any quality research. Arguments are stronger when backed by evidence from scholarly and academic information sources.
You may be asked to provide a Works Cited page, a Bibliography, an Annotated Bibliography, a Reference List or any combination of proof that you consulted relevant, accurate information sources as part of an assignment.
There are a number of helpful resources available for the major formatting styles. Pay attention to detail, be consistent and you should be okay.