APA (7th ed.) Citation

Popkin. (1992). Comprehensive structured COBOL (4th ed.). PWS Publishing Company.

Chicago Style (17th ed.) Citation

Popkin. Comprehensive Structured COBOL. 4th ed. Boston: PWS Publishing Company, 1992.

MLA (9th ed.) Citation

Popkin. Comprehensive Structured COBOL. 4th ed. PWS Publishing Company, 1992.

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