Berne, Eric
Oxford University Press, 1969
Buku Teks
Shapiro, Jerrold Lee
Brooks/Cole, 1985
Buku Teks
Levine, Baruch
Prentince Hall, 1979
Buku Teks
Kaplan, Harold I., author
Williams & Wilklins , 1993
Buku Teks
Ettin, Mark F.
Allyn and Bacon, 1992
Buku Teks