Kaplan, Bert, author
Peabody Museum, 1954
Buku Teks
Joke Widya, author
Universitas Indonesia, 1975
UI - Skripsi (Membership)
Fakultas Psikologi Universitas Indonesia, 2003
UI - Tesis (Membership)
Janda, Louis, author
John Wiley & Sons, 2001
Buku Teks
D`ambra, Gilles
Foulsham, 1999
Buku Teks