Cita APA (7th ed.)

Stern, N. B., & Stern, R. A. (1997). Structured COBOL programming (8th ed.). Wiley.

Cita Chicago (17th ed.)

Stern, Nancy B., i Robert A. Stern. Structured COBOL Programming. 8th ed. New York: Wiley, 1997.

Cita MLA (8th ed.)

Stern, Nancy B., i Robert A. Stern. Structured COBOL Programming. 8th ed. Wiley, 1997.