Cita APA (7th ed.)
Horn, L. W. (1995). Comprehensive structured COBOL (3rd.ed.). CTI.
Cita Chicago (17th ed.)
Horn, L. Wayne. Comprehensive Structured COBOL. 3rd.ed. Cambridge: CTI, 1995.
Cita MLA (9th ed.)
Horn, L. Wayne. Comprehensive Structured COBOL. 3rd.ed. CTI, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.