Spector, Paul E., author
Jones & Bartllett, 2012
Buku Teks
Allen, Louis A., author
McGraw-Hill, 1958
Buku Teks
Joan Marques, Satinder Dhiman, editors
Springer International Publishing, 2017
eBooks
edited by John W. Jones, Brian D. Steffy, Douglas W. Bray
Lexington Books, 1991
Buku Referensi
Reis, Matthew, author
[American Management Association;, ], 2010
eBooks