Stockton B. Colt, editor
[American Management Association, ], 1998
eBooks
Barry, John W., author
McGraw-Hill, 1981
Buku Teks
Ulanoff, Stanley M., editor-in-chief
McGraw-Hill, 1985
Buku Referensi
Baldwin, David A. (David Allen), author
Libraries Unlimited, 2003
Buku Referensi
Syackline, author
Fakultas Psikologi Universitas Indonesia, 2005
UI - Tesis (Membership)