Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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