Ponder, Randall D., author
EP Entrepreneur Press, 2005
Buku Teks
Hughes, Richard L., author
McGraw-Hill, 2002
Buku Teks
Bellows, Roger
Prentice-Hall, 1959
Buku Teks
Urwick, Lyndall F., author
Pitman Publishing Corporation , 1958
Buku Teks
Nahavandi, Afsaneh, author
Prentice-Hall, 2000
Buku Teks