1. Akerele, O. 1988. Medicinal plants and primary health care: an agenda for action. Fitoterapia 59:355–363.
2. Arvigo, R., and M. J. Balick. 1998. Rainforest remedies: 100 healing herbs of Belize. 2nd ed. Lotus Press, Twin Lakes, WI.
3. Astin, J. A. 1998. Why patients use alternative medicine. Journal of the American Medical Association 279(19):1548–1553.
4. Baca, J. E. 1978. Some health beliefs of the Spanish speaking. Pages 92–98in Ricardo A. Martinez, ed., Hispanic culture and health care: fact, fiction, folklore. The C.V. Mosby Company, St. Louis, MO.
5. Balick, M. J., and P. A. Cox. 1996. Plants, people and culture: the science of ethnobotany. W. H. Freeman and Company: Scientific American Library, New York.