APA (7th ed.) Citation

Hodgson, M., Paine, R., & Anderson, N. (1991). A guide to orchids of the world. Angus & Robertson.

Chicago Style (17th ed.) Citation

Hodgson, Margaret, Roland Paine, and Neville Anderson. A Guide to Orchids of the World. North Ryde, NSW: Angus & Robertson, 1991.

MLA (9th ed.) Citation

Hodgson, Margaret, et al. A Guide to Orchids of the World. Angus & Robertson, 1991.