Stephan N. Witt
John Wiley & Sons, 2011
Buku Teks SO
edited by Shamim I. Ahmad
Springer, 2012
eBooks
Pahlow, Mannfried
Barron's Educational Series, 1993
Buku Teks SO
L.B.S.Kardono, N.Artanti, I.D.Dewiyanti, T.Basuki, K.Padmawinata
Grasindo, 2003
Buku Teks SO
World Health Organization, 2002
Buku Teks SO