Cita APA (7th ed.)

Porter, W. T., & Perry, W. E. (1987). EDP, controls and auditing (5th ed.). Kent Pub. Co.

Cita Chicago (17th ed.)

Porter, W. Thomas, i William E. Perry. EDP, Controls and Auditing. 5th ed. Boston, Mass: Kent Pub. Co, 1987.

Cita MLA (9th ed.)

Porter, W. Thomas, i William E. Perry. EDP, Controls and Auditing. 5th ed. Kent Pub. Co, 1987.