Cita APA (7th ed.)

Teglovic, S., & Douglas, K. D. (1986). ANSI structured COBOL: An introduction. Irwin.

Cita Chicago (17th ed.)

Teglovic, Steve, i Kenneth D. Douglas. ANSI Structured COBOL: An Introduction. Homewood, Ill: Irwin, 1986.

Cita MLA (9th ed.)

Teglovic, Steve, i Kenneth D. Douglas. ANSI Structured COBOL: An Introduction. Irwin, 1986.