Q. How to reference a book cited multiple times in AMA?

On your references page, you only need to create one citation for each piece of information you use, such as a book or journal article. References are numbered, and appear in order in your reference list as they appear for the first time in the text of your paper (not alphabetically by author's name, as in other styles).

A superscript Roman numeral is used to direct your reader to the corresponding citation in your reference list.

Examples of various in-text references can be seen here:  http://libguides.css.edu/c.php?g=41669&p=264928

You need to use page numbers if you are citing a source more than once. See the last example on our guide page listed above.

This, from p. 358-359 of the AMA Manual of Style: A Guide for Authors and Editors, 10th edition.

8.6 Quotation marks are used to indicate material that is taken directly from another source.

8.7 Use quotation marks to enclose a direct quotation of no more than 4 lines from textual material or speeches (for longer material, see also 8.6.14, Quotations Marks, Block Quotations).