Kizza, Joseph Migga, author
Springer, 2017
Buku Teks
Shelly, Gary B., author
Anaheim Publishing, 1984
Buku Teks
Parsons, June, author
Cengage Learning, 2013
Buku Teks
Lorin, Harold, author
John Wiley & Sons, 1980
Buku Teks
Stallings, William, author
Macmillan, 1988
Buku Teks