Cita APA (7th ed.)
Stern, N., & Stern, R. A. (1997). Structured cobol programming (7th ed.). John Wiley.
Cita Chicago (17th ed.)
Stern, Nancy, i Robert A. Stern. Structured Cobol Programming. 7th ed. New York: John Wiley, 1997.
Cita MLA (9th ed.)
Stern, Nancy, i Robert A. Stern. Structured Cobol Programming. 7th ed. John Wiley, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.