Diehl, Harold S.
McGraw-Hill Book Comp., 1969
Buku Teks
Hursh, David W.
Springer, 2011
eBooks
Robinson, James, 1943-
Delmar, 2011
Buku Teks
edited by Christine Alavi
Routledge, 1995
Buku Teks
Fatimah
Fakultas Psikologi Universitas Indonesia, 2016
UI - Skripsi (Membership)