Simpkins, C. Alexander
Tao in ten
Tuttle Publishing, 2002
 Buku Teks SO
Guide To Natural Healing
Geddes & Grsset, 1997
 Buku Teks SO
Rafal, Serge
Natural Healing : Prevention and Healing for Everyday Living Protect againts illness, chose effective remedies
Octopus Publishing Group, 2003
 Buku Teks SO
Health and healing
compiled and edited by Elaine Cumming
Jossey-Bass, 1970
 Buku Teks SO
Guide to Natural Healing
Geddes & Grosset
Geddes & Grosset, 1997
 Buku Teks SO