Gaya APA

Wyk, B, V., Wink, M. (2004). Medicinal Plants of the World: on Illustrated Scientific Guide to Important Medicinal Plant and their uses . London: Timber Press.

Gaya MLA

Wyk, Ben-Erik, Van., Wink, Michael. "Medicinal Plants of the World: on Illustrated Scientific Guide to Important Medicinal Plant and their uses". London: Timber Press, 2004. print.