APA (7th ed.) Citation

Boettcher, R. R. (1987). Structured programming in COBOL. Holt, Rinehart and Winston.

Chicago Style (17th ed.) Citation

Boettcher, Robert R. Structured Programming in COBOL. New York: Holt, Rinehart and Winston, 1987.

MLA (9th ed.) Citation

Boettcher, Robert R. Structured Programming in COBOL. Holt, Rinehart and Winston, 1987.

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