Whitmire, Richard, author
Amacom, 2010
Buku Teks
Whitmire, Richard, author
[American Management Association, ], 2010
eBooks
Santrock, John W., author
McGraw-Hill, 2012
Buku Teks
Santrock, John W., author
McGraw-Hill, 2006
Buku Teks
Bimo Bramantyo, author
Fakultas Psikologi Universitas Indonesia, 2014
UI - Skripsi (Membership)