Cita APA (7a ed.)

Bradley, J. (1990). Comprehensive structured COBOL. Mitchell McGraw-Hill.

Cita Chicago Style (17a ed.)

Bradley, James. Comprehensive Structured COBOL. New York: Mitchell McGraw-Hill, 1990.

Cita MLA (9a ed.)

Bradley, James. Comprehensive Structured COBOL. Mitchell McGraw-Hill, 1990.