APA (7th ed.) Citation

Douglas, I., Huggett, R. J., & Robinson, M. E. (1996). Companion encyclopedia of geography: The environment and humankind. Routledge.

Chicago Style (17th ed.) Citation

Douglas, Ian, Richard J. Huggett, and M. E. Robinson. Companion Encyclopedia of Geography: The Environment and Humankind. London: Routledge, 1996.

MLA (9th ed.) Citation

Douglas, Ian, et al. Companion Encyclopedia of Geography: The Environment and Humankind. Routledge, 1996.