Haddad, Carol Joyce
Sage Publications, 2002
Buku Teks
Tidd, Joseph, author
John Wiley & Sons, 2013
Buku Teks
Harvard Business School Press, 2004
Buku Teks
Schilling, Melissa A, author
McGraw-Hill Irwin, 2005
Buku Teks
Schilling, Melissa A, author
McGraw-Hill, 2013
Buku Teks