Halsey, George D., author
Harper & Brothers, 1949
Buku Teks
Planty, Earl G.
Ronald Press Company, 1948
Buku Teks
Phillips, Jack J.
Jossey-Bass Publishers, 1987
Buku Teks
William J. Rothwell, Harvey L. Sterns, Diane Spokus, Joel M. Reaser
American Management Association, 2008
eBooks
Abdul Latif, author
Fakultas Psikologi Universitas Indonesia, 2012
UI - Tesis (Open)