Newall, Anderson & Phillipson: Herbal Medicines, A Guide for Health-Care Professionals, The Pharmaceutical Press, 1996.
Wren, Williamson, Evans: Potters New Cyclopaedia of Botanical Drugs and Preparations, C. W. Daniel Co. Ltd., 1988.
Mills & Bone: Principle and Practice of Phytotherapy, Modern Herbal Medicine, Churchill Livingstone, 2000.
S. Weed: Wise Woman Herbal for the Childbearing Year, Ash Tree Publishing, 1986.
R. Gladstar: Herbal Healing for Women, Simon & Schuster, 1993.
A. McQuade: Herbal Remedies for Women: Discover Nature's Wonderful Secrets Just for Women, Prima Lifestyles, 1997.
PubMed; a service of the U.S. National Library of Medicine that includes over 17 million citations from MEDLINE and other life science journals for biomedical articles back to the 1950s. PubMed includes links to full text articles and other related resources.
The Medline database.
Natural Standard online; Foods, Herbs & Supplements database.
Health World Online; Herbal Medicine Materia Medica, articles by David L. Hoffmann B.Sc. (Hons), M.N.I.M.H.