Evans, Mark
Lorenz Books, 2002
Buku Teks
Bill Gottlieb, Susan G. Berg, Patricia Fisher, Doug Dollemore, Mark Giuliucci, Jennifer Haigh, Sid Kirchheimer, Jean Callahan
Bantam Books, 1997
Buku Teks SO
Evans, Mark
Hermes House, 2000
Buku Teks SO
The American Association of Naturopathic Physicians, Susanne Althoff, Patricia N. Williams, Dianne Molvig, Larry Schuster
Publications International, 1997
Buku Teks SO
Bruce, Debra Fulghum
Macmillan General Reference, 1998
Buku Teks SO