APA (7th ed.) Citation

Popkin, G. S. (1989). Comprehensive structured COBOL (3. ed.). PWS-KENT Publ. Co.

Chicago Style (17th ed.) Citation

Popkin, Gary S. Comprehensive Structured COBOL. 3. ed. Boston: PWS-KENT Publ. Co, 1989.

MLA (9th ed.) Citation

Popkin, Gary S. Comprehensive Structured COBOL. 3. ed. PWS-KENT Publ. Co, 1989.

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