APA (7th ed.) Citation

O'Leary, T. J., & Williams, B. K. (1989). Computers and information systems (2nd ed.). Benjamin/Cummings Pub.

Chicago Style (17th ed.) Citation

O'Leary, T. J., and Brian K. Williams. Computers and Information Systems. 2nd ed. Redwood City, Calif: Benjamin/Cummings Pub, 1989.

MLA (9th ed.) Citation

O'Leary, T. J., and Brian K. Williams. Computers and Information Systems. 2nd ed. Benjamin/Cummings Pub, 1989.