APA (7th ed.) Citation

Douglas, E., Douglas, K., & Hughes, S. (2009). The camping book. Dorling Kindersley.

Chicago Style (17th ed.) Citation

Douglas, Ed, Kate Douglas, and Sue Hughes. The Camping Book. London: Dorling Kindersley, 2009.

MLA (9th ed.) Citation

Douglas, Ed, et al. The Camping Book. Dorling Kindersley, 2009.