APA (7th ed.) Citation

Williams, J. G., Fennessy, R., & Peterson, R. T. (1963). A field guide to the birds of East and Central Africa. Collins.

Chicago Style (17th ed.) Citation

Williams, John George, Rena Fennessy, and Roger Tory Peterson. A Field Guide to the Birds of East and Central Africa. London: Collins, 1963.

MLA (9th ed.) Citation

Williams, John George, et al. A Field Guide to the Birds of East and Central Africa. Collins, 1963.