Ibid

Ibid (Latin, short for "ibidem," "the same place") is the term used to provide an endnote or footnote citation for a source that was cited in the last endnote or footnote. It is also sometimes abbreviated "Id.," especially in legal documents.

Additional reading:

• MLA Handbook (may or may not apply to APA, see "APA".)

See also:

• APA Style
• MLA Style
• bibliography