Graham, David T., author
Prentice-Hall, 2000
Buku Teks
Smith-Hemphill, D.A., author
Amacom, 1999
Buku Teks
Schneider, Gary P., author
Course Technology Cengage Learning, 2013
Buku Teks
Kent, Peter, author
Prentice Hall of India, 1996
Buku Teks
Kent, Peter, author
Andi, 1996
Buku Teks