A citation is an acknowledgement that you have used someone else's research or ideas in the creation of your own research paper or essay.
In addition to giving credit to authors for using their work, citations allow readers of your work to track down sources that might be of interest to them.
From the Purdue Writing Lab
Whether you are quoting directly or paraphrasing, you make a brief in-text citation at the point in your writing where you use another person's work. In APA style, this generally includes mention of the author, the date of the publication, and page number, when necessary.
The References page goes at the end of your research paper and includes full citations for all of the sources you consulted.
NoodleTools is a full featured citation and research tool that will help you format and save your citations online. It can help you through the citation process step by step. It can also help you create and manage an outline and/or notecards for your paper, and can help you share your sources with other users.
Choose "Manual Entry" and enter the source type and all the citation information. Zbib will format the citation for you.