Gaya APA

Pridgeon, A, M, [, A. (2001). Genera orchidacearum : volume 2 Orchidoideae (part one) (1st ed.). Oxford: Oxford University Press.

Gaya MLA

Pridgeon, Alec, M., [et, Al.]. "Genera orchidacearum : volume 2 Orchidoideae (part one)". 1st ed. Oxford: Oxford University Press, 2001. Text.