APA (7th ed.) Citation

Moore, S. (1991). The definitive Diana: An intimate look at the Princess of Wales from A to Z. Contemporary Books.

Chicago Style (17th ed.) Citation

Moore, Sally. The Definitive Diana: An Intimate Look at the Princess of Wales from A to Z. Chicago: Contemporary Books, 1991.

MLA (9th ed.) Citation

Moore, Sally. The Definitive Diana: An Intimate Look at the Princess of Wales from A to Z. Contemporary Books, 1991.

Warning: These citations may not always be 100% accurate.