Moekijat, author
Mandar Maju, 1990
Buku Teks
Hanna, David P.
Addison-Wesley, 1988
Buku Teks
Bennis, Warren G., author
McGraw-Hill, 1966
Buku Teks
Barron, Robert A., author
Allyn and Bacon, 1990
Buku Teks
Cohen, Allan R., author
McGraw-Hill, 2001
Buku Teks