Fakultas Psikologi Universitas Indonesia, 1981
UI - Skripsi (Membership)
Newman, Barbara M.
Cengage Learning, 2018
Buku Teks
Sinaulan, Richard Wantian, author
1983
UI - Skripsi (Membership)
Devita Kusindiati, author
2004
UI - Skripsi (Membership)
Craig, Garce J.
Prentice-Hall, 1992
Buku Teks