Footnote

http://img209.imageshack.us/img209/7205/footnotepo4.jpg A footnote or an endnote consists of two linked parts — the note reference mark (note reference mark: A number, character, or combination of characters that indicates that additional information is contained in a footnote or endnote.) and the corresponding note text.

What are Footnotes?

 * Are notes that appear at the bottom (or “foot”) of the page. The writer refers the reader to footnotes by placing numbers at the ends of sentences.
 *  The number refers the reader to the bottom of the page, or to a separate page at the end of your paper, where the writer (you) explains the sentence above, or gives more information, or tells the reader where you got the information in the sentence.

What are Endnotes?

 * End notes work the same way, but they are put at the end of a sentence in parentheses (like this). The end notes refer the reader to a separate sheet at the end of your paper.
 *  For example, if your paper used information from a book by someone named Jones, you would record the information about that book on the end notes page of your paper, and every time you used something from the Jones book in your paper you would place an end note at the end of that sentence, like this (Jones, p. 34.)