APA (7th ed.) Citation

Fowler, George C. (1990). COBOL: Structured programming techniques for solving problems/ George C. Fowler. Boyd & Fraser.

Chicago Style (17th ed.) Citation

Fowler, George C. COBOL: Structured Programming Techniques for Solving Problems/ George C. Fowler. Boston, mass: Boyd & Fraser, 1990.

MLA (9th ed.) Citation

Fowler, George C. COBOL: Structured Programming Techniques for Solving Problems/ George C. Fowler. Boyd & Fraser, 1990.