Long, L. E., & Long, N. (1997). Introduction to computers & information systems (5th ed., the Internet ed.). Prentice Hall.

Long, Larry E., and Nancy Long. Introduction to Computers & Information Systems. 5th ed., the Internet ed. Upper Saddle River, NJ: Prentice Hall, 1997.

Long, Larry E., and Nancy Long. Introduction to Computers & Information Systems. 5th ed., the Internet ed. Prentice Hall, 1997.