Frank, Barney, author
Times Book, 1999
Buku Teks
Dupuy
Sijthoff & Noordhoff, 1978
Buku Teks
Fried, George H., author
McGraw-Hill, 1990
Buku Teks
Fried, Robert C., author
Yale University Press , 1963
Buku Teks
Fakultas Psikologi Universitas Indonesia, 2003
UI - Tesis (Membership)