Kennedy, Gavin, author
Harvard Business School Press, 994
Buku Referensi
Camp, Jim
Kelompak Gramedia, 2002
Buku Teks
Harris, Charles Edison
Van Nostrand Reinhold, 1983
Buku Teks
Lewicki, Roy J., author
McGraw-Hill Education, 2016
Buku Teks
Mills, Harry, author
American Management Association, 2005
eBooks