Johnson, R. L., Foster, S., Low Dog, T., & Kiefer, D. (2010). National Geographic guide to medicinal herbs: The world's most effective healing plants. National Geographic.
Chicago-Zitierstil (17. Ausg.)Johnson, Rebecca L., Steven Foster, Tieraona Low Dog, und David Kiefer. National Geographic Guide to Medicinal Herbs: The World's Most Effective Healing Plants. Washington, D.C: National Geographic, 2010.
MLA-Zitierstil (9. Ausg.)Johnson, Rebecca L., et al. National Geographic Guide to Medicinal Herbs: The World's Most Effective Healing Plants. National Geographic, 2010.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.