Van Wyk, B., & Wink, M. (2009). Medicinal plants of the world: An illustrated scientific guide to important medicinal plants and their uses. Briza.

Van Wyk, Ben-Erik, and Michael Wink. Medicinal Plants of the World: An Illustrated Scientific Guide to Important Medicinal Plants and Their Uses. Pretoria: Briza, 2009.

Van Wyk, Ben-Erik, and Michael Wink. Medicinal Plants of the World: An Illustrated Scientific Guide to Important Medicinal Plants and Their Uses. Briza, 2009.