(1999). Herbal therapy, medicinal plants, and natural products: An IPA compilation. ASHP.
Chicago-viite (17. p.)Herbal Therapy, Medicinal Plants, and Natural Products: An IPA Compilation. Bethesda, MD: ASHP, 1999.
MLA-viite (9. p.)Herbal Therapy, Medicinal Plants, and Natural Products: An IPA Compilation. ASHP, 1999.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.