Duran, Randall E.
Financial services technology processes architecture and sooutions
Cengage Learning, 2013
 Buku Teks
Computer applications in management
Brandon/Systems Press, 1970
 Buku Teks
Neukrug, Ed
Theory, practice, and trends in human services: an introduction
Thomson Learning, Inc., 2004
 Buku Teks
Neukrug, Edward S.
Theory, practice, and trends in human services : an introduction
Cengage Learning, 2017
 Buku Teks
COSITU: software for the calculation of costs, tariffs and rates for telephone services
International Telecommunication Union, 2004
 Buku Teks