Which information must be followed by a citation..apex?

In MLA style, an author-page style parenthetical citation should include the author's last name and the page number(s) from the source.

A parenthetical citation for a print source (books, magazines, scholarly journal articles, newspapers) with a known author should include a signal Word or phrase (usually the author's last name) and a page number.

A parenthetical citation for print source with no known author should include a shortened title of the work and a page number.

Other things that may need to be included in a parenthetical citation include information about the edition of the source, a first initial if authors have the same last name, the volume number if citing from different volumes of a multi-volume work, and, when citing The Bible, the version you are using along with book, chapter, and verse.