Using notes and bibliography style, the sourced text is indicated by a superscripted note number that corresponds to a full citation either at the bottom of the page (as a footnote) or at the end of a main body of text (as an endnote). In both instances, the citation is also placed in a bibliography entry at the end of the material, listed in alphabetical order of the author's last name. The two formats differ: notes use commas where bibliography entries use periods.