APA (7th ed.) Citation

Schultes, R. E. (1960). Native orchids of Trinidad and Tobago. Pergamon Press.

Chicago Style (17th ed.) Citation

Schultes, Richard Evans. Native Orchids of Trinidad and Tobago. New York: Pergamon Press, 1960.

MLA (9th ed.) Citation

Schultes, Richard Evans. Native Orchids of Trinidad and Tobago. Pergamon Press, 1960.