APA (7th ed.) Citation

Conboy, M., & Ballard, R. D. (2004). In search of Easter. National Geographic.

Chicago Style (17th ed.) Citation

Conboy, Martha, and Robert D. Ballard. In Search of Easter. [Washington, DC?]: National Geographic, 2004.

MLA (8th ed.) Citation

Conboy, Martha, and Robert D. Ballard. In Search of Easter. National Geographic, 2004.

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