Dyfyniad APA

Parkin, A. . .., & Yorke, R. . .. (1975). Cobol for students. Arnold.

Dyfyniad Arddull Chicago

Parkin, Andrew ., and Richard Yorke. Cobol for Students. London: Arnold, 1975.

Dyfyniad MLA

Parkin, Andrew ., and Richard Yorke. Cobol for Students. Arnold, 1975.

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