APA Style

Cullen, J., Cullen, J. (1992). The orchid book: a guide to the identification of cultivated orchid species . NewYork: Cambrige University press.

Chicago Style

Cullen, J., Cullen, J. The orchid book: a guide to the identification of cultivated orchid species. NewYork: Cambrige University press, 1992. .

MLA Style

Cullen, J., Cullen, J. The orchid book: a guide to the identification of cultivated orchid species. NewYork: Cambrige University press, 1992. .

Turabian Style

Cullen, J., Cullen, J. The orchid book: a guide to the identification of cultivated orchid species. NewYork: Cambrige University press, 1992. .