It depends on the format. I know for MLA format which a lot of middle and high schoolers use for English, the author's name goes in with the page number citation when there are multiple authors for one book.
Ex: "direct quote" (<em>author's name</em> 99).
But, if you are setting up a signal phrase with context, the author's name goes before your quote with the page number after. You could also simply say "the author says" as long as you've included the author's name prior to the quote and signal phrase.
Ex: When she ate an apple in the garden, <em>author''s name</em> narrates, "direct quote" (99).
I hope this helped. Also, here is a website I use that states rules for the format you are using for your writing assignment! https://owl.purdue.edu/owl/research_and_citation/mla_style/mla_style_introduction.html
