APA (7th ed.) Citation

Kruzas, A. T., & Schmittroth, J. (1981). Encyclopedia of information systems and services (4th ed.). Gale Research.

Chicago Style (17th ed.) Citation

Kruzas, Anthony Thomas, and John Schmittroth. Encyclopedia of Information Systems and Services. 4th ed. Detroit, Mich: Gale Research, 1981.

MLA (9th ed.) Citation

Kruzas, Anthony Thomas, and John Schmittroth. Encyclopedia of Information Systems and Services. 4th ed. Gale Research, 1981.