APA (7th ed.) Citation

Williams, J. G. (1988). The Collins field guide to the national parks of East Africa (1. publ. in the USA.). Greene.

Chicago Style (17th ed.) Citation

Williams, John George. The Collins Field Guide to the National Parks of East Africa. 1. publ. in the USA. Lexington, Mass: Greene, 1988.

MLA (9th ed.) Citation

Williams, John George. The Collins Field Guide to the National Parks of East Africa. 1. publ. in the USA. Greene, 1988.