APA (7th ed.) Citation

Sheehan, T. J. (1979). Orchid Genera illustrated.

Chicago Style (17th ed.) Citation

Sheehan, Thomas John. Orchid Genera Illustrated. 1979.

MLA (9th ed.) Citation

Sheehan, Thomas John. Orchid Genera Illustrated. 1979.

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