APA (7th ed.) Citation

Gale Research Company, Kruzas, A. T., & Schmittroth, J. (1981). Encyclopedia of information systems and services (Fourth edition.). Gale Research.

Chicago Style (17th ed.) Citation

Gale Research Company, Anthony T. Kruzas, and John Schmittroth. Encyclopedia of Information Systems and Services. Fourth edition. Detroit, Michigan.: Gale Research, 1981.

MLA (8th ed.) Citation

Gale Research Company, et al. Encyclopedia of Information Systems and Services. Fourth edition. Gale Research, 1981.

Warning: These citations may not always be 100% accurate.