Emerald Publishing Limited, 2019
eBooks
Kornblum, William
Wadsworth and Cengage Learning, 2012
Buku Teks
Kornblum, William
Harcourt Brace College Publishers, 1997
Buku Teks
Bryjak, George J
Allyn and Bacon, 1994
Buku Teks
Fakultas Psikologi Universitas Indonesia, 2004
UI - Skripsi (Membership)