Cita APA (7th ed.)

Shelly, G. B. (2000). Structured cobol programming (2nd ed.). Course Technology.

Cita Chicago (17th ed.)

Shelly, Gary B. Structured Cobol Programming. 2nd ed. Cambridge, Massachusetts: Course Technology, 2000.

Cita MLA (9th ed.)

Shelly, Gary B. Structured Cobol Programming. 2nd ed. Course Technology, 2000.