Dyfyniad APA

Philippakis, A. S., & Kazmier, L. J. (1981). Structured COBOL (2nd ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

Philippakis, Andreas S., and Leonard J. Kazmier. Structured COBOL. 2nd ed. New York: McGraw-Hill, 1981.

Dyfyniad MLA

Philippakis, Andreas S., and Leonard J. Kazmier. Structured COBOL. 2nd ed. McGraw-Hill, 1981.

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