APA (7th ed.) Citation

Henry, G. M. (1955). A guide to the birds of Ceylon. Oxford University Press.

Chicago Style (17th ed.) Citation

Henry, G. M. A Guide to the Birds of Ceylon. London, New York: Oxford University Press, 1955.

MLA (9th ed.) Citation

Henry, G. M. A Guide to the Birds of Ceylon. Oxford University Press, 1955.