1.
Veitch, N. C., Smith, M. & Baxter, I. A. Herbal Medicines. (Pharmaceutical Press, London, 2013).
2.
Edwards, S. E. Phytopharmacy: An Evidence-Based Guide to Herbal Medical Products.
3.
European Scientific Cooperative on Phytotherapy. E/S/C/O/P Monographs: The Scientific Foundation for Herbal Medicinal Products. (E/S/C/O/P, Exeter ; Stuttgart, 1999).
4.
Heinrich, M. Fundamentals of Pharmacognosy and Phytotherapy. (Churchill Livingstone/Elsevier, Edinburgh, 2012).
5.
Stockley’s Herbal Medicines Interactions: A Guide to the Interactions of Herbal Medicines. (Pharmaceutical Press, London, 2013).
6.
Heinrich, M. Quality and safety of herbal medical products: regulation and the need for quality assurance along the value chains. British Journal of Clinical Pharmacology 80, 62–66 (2015).
7.
Prance, G. T. & Nesbitt, M. The Cultural History of Plants. (Routledge, New York, 2005).
8.
Karsch-Völk, M. et al. Echinacea for preventing and treating the common cold. in Cochrane Database of Systematic Reviews (John Wiley & Sons, Ltd, Chichester, UK, 1996). doi:10.1002/14651858.CD000530.pub3.
9.
Lockwood, B. & Rapport, L. Nutraceuticals: A Guide for Healthcare Professionals. (Pharmaceutical Press, London, 2007).
10.
Kayne, S. B. Complementary and Alternative Medicine. (Pharmaceutical Press, London, 2009).
11.
Wichtl, M., Brinckmann, J. & Lindenmaier, M. P. Herbal Drugs and Phytopharmaceuticals: A Handbook for Practice on a Scientific Basis. (Medpharm, Stuttgart ; Boca Raton, 2004).
12.
Williamson, E. M. Major Herbs of Ayurveda. (Churchill Livingstone, London, 2002).
13.
Stockley’s Herbal Medicines Interactions: A Guide to the Interactions of Herbal Medicines. (Pharmaceutical Press, London, 2013).
14.
Witt, C. M. Clinical research on traditional drugs and food items—the potential of comparative effectiveness research for interdisciplinary research. Journal of Ethnopharmacology 147, 254–258 (2013).
15.
Medicines and Healthcare products Regulatory Agency - GOV.UK. https://www.gov.uk/government/organisations/medicines-and-healthcare-products-regulatory-agency.
16.
British Pharmacopoeia Commission & Stationery Office (Great Britain). British Pharmacopoeia 2016. (Stationery Office, London, 2015).
17.
MedicinesComplete. https://www.medicinescomplete.com/mc/.