APA

Devries P. J., . (1987). Butterflies of Costa Rica and their natural history Papilionidae, Pieridae, Nymphalidae. New Jersey: Princeton University Press.

Chicago

Devries Philip J, . 1987. Butterflies of Costa Rica and their natural history Papilionidae, Pieridae, Nymphalidae. New Jersey: Princeton University Press.

Harvard

Devries P. J., . (1987). Butterflies of Costa Rica and their natural history Papilionidae, Pieridae, Nymphalidae. New Jersey: Princeton University Press.

MLA

Devries Philip J, . Butterflies of Costa Rica and their natural history Papilionidae, Pieridae, Nymphalidae. New Jersey: Princeton University Press. 1987.