APA (7th ed.) Citation

Pennington, K. (1994). Pennington's butterflies of Southern Africa (2. ed.). Struik.

Chicago Style (17th ed.) Citation

Pennington, Ken. Pennington's Butterflies of Southern Africa. 2. ed. Cape Town: Struik, 1994.

MLA (9th ed.) Citation

Pennington, Ken. Pennington's Butterflies of Southern Africa. 2. ed. Struik, 1994.