citation is a brief description of one specific information source,
usually appearing in a bibliography, list of references, or a database.
It includes enough information to permit the reader to find the source
and may appear in a number of variant formats, e.g. American
Psychological Association (APA), Modern Language Association (MLA),
Council of Biology Editors (CBE), or Chicago Style.
A citation is made of parts, each part indicating specific
information about the source. You can usually tell what type of source
is being described by looking carefully at the citation. The citation
below (in APA style) refers to an article found in a journal called
The Priest .