Polunin, Miriam
The Natural Pharmacy: An encyclopedic illustrated guide to medicines from nature
Greenwich Editions, 1999
 Buku Teks SO
Shealy, C. Norman
The Illustrated Encyclopedia of Healing Remedies: Over 1000 natural remedies for the prevention, treatment, and cure of common ailments and conditions
Element Books, 1998
 Buku Teks SO
Weintraub, Skye
Natural Treatments for ADD and Hyperactivity
Woodland Publishing, 1997
 Buku Teks SO
Weintraub, Skye
Natural Treatments for ADD and Hyperactivity
Woodland Publishing, 1997
 Buku Teks SO
Cohen, Jay S
Natural ALternatives to Lipitor, Zocor & Other Statin Drugs: What to Use and Do to Help Lower Your Bad Cholesterol
Square One Publisher, 2006
 Buku Teks SO