Woolfe, Lorin, author
[American Management Association;, ], 2002
eBooks
Zenger, John H., author
McGraw-Hill, 2004
Buku Referensi
Zenger, John H., author
McGraw-Hill, 2003
Buku Teks
Harvard Bussiness School Press, 1990
Buku Teks
Hughes, Richard L., author
McGraw-Hill, 2012
Buku Teks