Dyfyniad APA

Stern, N. B., & Stern, R. A. (1991). Structured COBOL programming (6th ed.). Wiley.

Dyfyniad Arddull Chicago

Stern, Nancy B., and Robert A. Stern. Structured COBOL Programming. 6th ed. New York: Wiley, 1991.

Dyfyniad MLA

Stern, Nancy B., and Robert A. Stern. Structured COBOL Programming. 6th ed. Wiley, 1991.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.