Weinstein, Bob, author
John Wiley & Sons, 1982
Buku Teks
Fong, Wai Mun, author
McGrawHill, 2004
Buku Teks
Speinkel, Beryl W., author
Dow Jones-Irwin, 1977
Buku Teks
Tobias, Andrew P.
Simon & Schuster , 1991
Buku Teks
Andhika Putra, author
Fakultas Psikologi Universitas Indonesia, 2013
UI - Skripsi (Membership)