APA (7th ed.) Citation

Dressler, R. L. (1981). The orchids: Natural history and classification. Harvard University Press.

Chicago Style (17th ed.) Citation

Dressler, Robert L. The Orchids: Natural History and Classification. Cambridge, Mass. [u.a.]: Harvard University Press, 1981.

MLA (9th ed.) Citation

Dressler, Robert L. The Orchids: Natural History and Classification. Harvard University Press, 1981.