Korda, Philippe, 1960-
Buisiness Expert Press, 2012
Buku Teks
Tan, Joo Seng
McGraw-Hill, 2004
Buku Teks
Flenning, Peter
Megapoin, 1996
Buku Teks
Shin, Edysen
Alfa Cemerlang Edindo (AceLearnings), 2016
Buku Teks
Tracy, Brian
American Management Association, 2013
eBooks