APA (7th ed.) Citation

Riley, N. D. (1975). A field guide to the butterflies of the West Indies. Collins.

Chicago Style (17th ed.) Citation

Riley, N. D. A Field Guide to the Butterflies of the West Indies. London: Collins, 1975.

MLA (9th ed.) Citation

Riley, N. D. A Field Guide to the Butterflies of the West Indies. Collins, 1975.

Warning: These citations may not always be 100% accurate.