Ronis, Diane, author
Corwin Press, 2007
Buku Teks
Shank, Patti, author
American Management Association, 2009
eBooks
editor, Dirk Ifenthaler, Deniz Eseryel, Xun Ge
Springer, 2012
eBooks
Linawati Hambali, author
Fakultas Psikologi Universitas Indonesia, 1978
UI - Skripsi (Membership)
Otty Prawira Hananto, author
Fakultas Psikologi Universitas Indonesia, 1977
UI - Skripsi (Membership)