APA (7th ed.) Citation

Pennington, K., Dickson, C. G. C., & Kroon, D. M. (1978). Pennington's Butterflies of Southern Africa. Ad. Donker.

Chicago Style (17th ed.) Citation

Pennington, Ken, C. G. C. Dickson, and D. M. Kroon. Pennington's Butterflies of Southern Africa. Johannesburg: Ad. Donker, 1978.

MLA (9th ed.) Citation

Pennington, Ken, et al. Pennington's Butterflies of Southern Africa. Ad. Donker, 1978.