World Health Organization. (1998). Guidelines for the appropriate use of herbal medicines. World Health organization.
Chicago-Zitierstil (17. Ausg.)World Health Organization. Guidelines for the Appropriate Use of Herbal Medicines. Manila: World Health organization, 1998.
MLA-Zitierstil (8. Ausg.)World Health Organization. Guidelines for the Appropriate Use of Herbal Medicines. World Health organization, 1998.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.