Bryson, John M., author
Jossey- Bass, 2011
Buku Teks
Bryson, John M., author
Jossey-Bass, 2011
Buku Teks
Kearns, Kevin P.
Jossey-Bass Publishers, 1996
Buku Teks
Kotler, Philip, author
Prentice-Hall, 1995
Buku Teks
Pynes, Joan, author
Jossey-Bass, 2013
Buku Teks