Underhill, Brian O.
Berrett-Koehler Publishers, Inc., 2007
Buku Teks SO
Maxwell, John C.
Menuju Insan Cemerlang (MIC), 2015
Buku Teks SO
Dow Jones Asia Dialogue, 1996
Buku Teks SO
edited by Edward T. Reilly
[American Management Association, ], 2013
eBooks
Fernandez, Juan Antonio
John Wiley & Sons (Asia), 2006
Buku Teks