When a specific page, section, equation, or other division of the work is cited, it follows the date, preceded by a comma. When a volume as a whole is referred to, without a page number, vol. is used. For volume plus page, only a colon is needed. The n in the Fischer and Siple example below indicates "note" (see ). The last example shows how one might cite a section of a work that contains no page or section numbers or other numerical signposts—the case for some electronic documents (see ).