What is a citation?
A citation is a description of a book, article, website, etc. that provides enough information so that others can locate the source you used themselves. It allows you to credit the authors of the sources you use and clarify which ideas belong to you and which belong to other sources.
What information is included?
Citation information usually includes: author(s), date of publication, title, and publisher's name and location (and for articles: journal title, volume, issue and page numbers).
What is Plagiarism?
Plagiarism is the act of plagiarizing which is when someone:
steals and passes off (the ideas or words of another) as one's own;
uses (another's production) without crediting the source;
commits literary theft;
presents as new and original an idea or product derived from an existing source.