APA (7th ed.) Citation

Weinberg, G. M., & Geller, D. P. (1985). Computer information systems: An introduction to data processing. Little, Brown.

Chicago Style (17th ed.) Citation

Weinberg, Gerald M., and Dennis P. Geller. Computer Information Systems: An Introduction to Data Processing. Boston: Little, Brown, 1985.

MLA (9th ed.) Citation

Weinberg, Gerald M., and Dennis P. Geller. Computer Information Systems: An Introduction to Data Processing. Little, Brown, 1985.