Leung, Albert Y.
Encyclopedia of common natural ingredients used in food, drugs, and cosmetics
Wiley, 1996
 Buku Referensi
Sambidge, Gordon
Natural remedies : common ailments cured
Piccadilly Press Ltd., 1992
 Buku Referensi
Smyth, Angela
Gentle medicine : an A-Z of natural remedies for common ailments
Thorsons, 1994
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Giller, Robert M.
Natural prescriptions : effective treatments for over 100 common complaints
Pavilion, 1995
 Buku Referensi
Guide To Natural Healing
Geddes & Grsset, 1997
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