Harvard Bussiness School Press, 1990
Buku Teks
Blank, Warren
[American Management Association, ], 2001
eBooks
Aubrey, Bob, 1921-2014
McGraw-Hill, 2012
Buku Teks
Zenger, John H.
McGraw-Hill, 2004
Buku Referensi
Mackoff, Barbara
American Management Association, 2001
Buku Teks