APA (7th ed.) Citation

Porter, W. T., & Perry, W. E. (1981). EDP: Controls and auditing (3. ed.). Kent.

Chicago Style (17th ed.) Citation

Porter, W. T., and William E. Perry. EDP: Controls and Auditing. 3. ed. Boston: Kent, 1981.

MLA (9th ed.) Citation

Porter, W. T., and William E. Perry. EDP: Controls and Auditing. 3. ed. Kent, 1981.