World Health Organization. (2003). WHO guidelines on good agricultural and collection practices [GACP] for medicinal plants. WHO.
Chicago-Zitierstil (17. Ausg.)World Health Organization. WHO Guidelines on Good Agricultural and Collection Practices [GACP] for Medicinal Plants. Geneva: WHO, 2003.
MLA-Zitierstil (9. Ausg.)World Health Organization. WHO Guidelines on Good Agricultural and Collection Practices [GACP] for Medicinal Plants. WHO, 2003.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.