APA (7th ed.) Citation

Gifford, C., & Cousens, D. (2009). 10 kings & queens who changed the world (1st American ed.). Kingfisher.

Chicago Style (17th ed.) Citation

Gifford, Clive, and David Cousens. 10 Kings & Queens Who Changed the World. 1st American ed. New York: Kingfisher, 2009.

MLA (8th ed.) Citation

Gifford, Clive, and David Cousens. 10 Kings & Queens Who Changed the World. 1st American ed. Kingfisher, 2009.

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