APA (7th ed.) Citation

Popkin, G. S. (1989). Comprehensive structured COBOL: Instructor's manual (3rd ed.). PWS-Kent.

Chicago Style (17th ed.) Citation

Popkin, Gary S. Comprehensive Structured COBOL: Instructor's Manual. 3rd ed. Boston: PWS-Kent, 1989.

MLA (9th ed.) Citation

Popkin, Gary S. Comprehensive Structured COBOL: Instructor's Manual. 3rd ed. PWS-Kent, 1989.

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