APA (7th ed.) Citation

Popkin, G. S. (1983). Advanced structured COBOL. Kent Pub. Co.

Chicago Style (17th ed.) Citation

Popkin, Gary S. Advanced Structured COBOL. Boston, Mass: Kent Pub. Co, 1983.

MLA (9th ed.) Citation

Popkin, Gary S. Advanced Structured COBOL. Kent Pub. Co, 1983.