Willard, T. (1993). Edible and medicinal plants of the Rocky Mountains and neighbouring territories (2. print.). Wild Rose College of Natural Healing.
Chicago-Zitierstil (17. Ausg.)Willard, Terry. Edible and Medicinal Plants of the Rocky Mountains and Neighbouring Territories. 2. print. Calgary, Alberta: Wild Rose College of Natural Healing, 1993.
MLA-Zitierstil (9. Ausg.)Willard, Terry. Edible and Medicinal Plants of the Rocky Mountains and Neighbouring Territories. 2. print. Wild Rose College of Natural Healing, 1993.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.