Cullen, J. (1992). The Orchid book: A guide to the identification of cultivated orchid species. Cambridge University Press.
Chicago Style (17th ed.) CitationCullen, J. The Orchid Book: A Guide to the Identification of Cultivated Orchid Species. Cambridge ; New York, NY, USA: Cambridge University Press, 1992.
MLA (9th ed.) CitationCullen, J. The Orchid Book: A Guide to the Identification of Cultivated Orchid Species. Cambridge University Press, 1992.
Warning: These citations may not always be 100% accurate.