APA (7th ed.) Citation

Sheehan, T., & Sheehan, M. (1994). An illustrated survey of orchid genera. Cambridge University Press.

Chicago Style (17th ed.) Citation

Sheehan, Tom, and Marion Sheehan. An Illustrated Survey of Orchid Genera. Cambridge: Cambridge University Press, 1994.

MLA (8th ed.) Citation

Sheehan, Tom, and Marion Sheehan. An Illustrated Survey of Orchid Genera. Cambridge University Press, 1994.

Warning: These citations may not always be 100% accurate.