APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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