APA (7th ed.) Citation

Pridgeon, A. M. (1992). The illustrated encyclopedia of orchids. Timber Press.

Chicago Style (17th ed.) Citation

Pridgeon, Alec M. The Illustrated Encyclopedia of Orchids. Portland, Or: Timber Press, 1992.

MLA (9th ed.) Citation

Pridgeon, Alec M. The Illustrated Encyclopedia of Orchids. Timber Press, 1992.