Kaufman, Donald G.
Kendall/Hunt, 1996
Buku Teks
Dasmann, Raymond F. (Raymond Fredric)
John Wiley & Sons, 1975
Buku Teks
Chiras, Daniel D.
Pearson, 2014
Buku Teks
Greenland, David
Charles E. Merrill, 1983
Buku Teks
Handriatno Waseso
Fakultas Psikologi Universitas Indonesia, 2001
UI - Skripsi Membership