APA (7th ed.) Citation

Sumner, J. (2000). The natural history of medicinal plants. Timber Press.

Chicago Style (17th ed.) Citation

Sumner, Judith. The Natural History of Medicinal Plants. Portland, Or: Timber Press, 2000.

MLA (9th ed.) Citation

Sumner, Judith. The Natural History of Medicinal Plants. Timber Press, 2000.