Harvard Bussiness School Press, 1990
Buku Teks
Blank, Warren, author
[American Management Association, ], 2001
eBooks
D.C. TAM , 1973
Buku Teks
Aubrey, Bob, 1921-2014, author
McGraw-Hill, 2012
Buku Teks
Zenger, John H., author
McGraw-Hill, 2004
Buku Referensi