Παραπομπή APA

Cullen,J. (1992). Orchid book: A guide to the identification of cultivated orchid species. Cambridge University Press.

Παραπομπή Chicago Style

Cullen,J. Orchid Book: A Guide to the Identification of Cultivated Orchid Species. United Kingdom: Cambridge University Press, 1992.

Παραπομπή MLA

Cullen,J. Orchid Book: A Guide to the Identification of Cultivated Orchid Species. Cambridge University Press, 1992.