APA

Douglas I., Huggett R. & Robinson M. (1996). Companion Encyclopedia of Geography. London: Boutledge.

Chicago

Douglas Ian, Huggett Richard and Robinson Mike. 1996. Companion Encyclopedia of Geography. London: Boutledge.

Harvard

Douglas I., Huggett R. and Robinson M. (1996). Companion Encyclopedia of Geography. London: Boutledge.

MLA

Douglas Ian, Huggett Richard and Robinson Mike. Companion Encyclopedia of Geography. London: Boutledge. 1996.