Bettelheim, Frederick A., author
Thomson, Brooks/Cole, 2007
Buku Teks
Beran, J.A., author
John Wiley & Sons, 2009
Buku Teks
Bettelheim, Frederick A., author
Harcourt Brace Jovanovich College, 1991
Buku Teks
Ochiai, Ei-Ichiro, author
Macmillan Press, 1979
Buku Teks
Bodner, George M.
Burgess, 1981
Buku Teks