1. Addae-Mensah I. Towards a national scientific basis for herbal medicine–a phytochemists two decade contribution. Ghana: Accra; 1992.
2. Curtis S, Taket A. Health and societies: changing perspective. New York: Edward Arnorld; 1995.
3. World Health Organization. Traditional and Modern Medicine: Harmonizing the Two Approaches. Manila: WHO Regional Office for the Western Pacific; 2000.
4. Kleinman A, Eisenberg L, Good B. Culture, illness, and care. Clinical lessons from anthropologic and cross-cultural research. Ann Intern Med. 1978;88(2):251–8. Available from: http://annals.org/aim/article-abstract/691789/culture-illness-care-clinical-lessons-from-anthropologic-cross-cultural-research?volume=88&issue=2&page=251
5. Raphael E, Kenneth K. Factors affecting the utilization of herbal medicine as a livelihood alternative among residents of Imo State: the role of social work professionals. IOSR Journal of Humanities and Social Science. 2016;21(5):66–78.