Sienko, Michell J., author
McGraw-Hill, 1961
Buku Teks
Dini Apdelina, author
Fakultas Psikologi Universitas Indonesia, 2013
UI - Tesis (Membership)
Cininta Ayu Candani Kryandhari, author
Universitas Indonesia, 2012
UI - Skripsi (Membership)
Timberlake, Karen C., author
Pearson - Prentice Hall, 2009
Buku Teks
Hill, John W., author
Prentice-Hall, 1993
Buku Teks