Highet, Gilbert, author
Columbia University Press, 1954
Buku Teks
Fakultas Psikologi Universitas Pancasila, 2017
Majalah, Jurnal, Buletin
Coon, Dennis, author
Wadsworth , 2001
Buku Teks
Coon, Dennis, author
MA Cengage Learning, 2016
Buku Teks
Nairne, James S.
Books Cole Pub. , 1996
Buku Teks