Dyfyniad APA

Bookman, H. (1993). COBOL/370 for VS COBOL and COBOL II programmers. McGraw-Hill.

Dyfyniad Arddull Chicago

Bookman, Harvey. COBOL/370 for VS COBOL and COBOL II Programmers. New York: McGraw-Hill, 1993.

Dyfyniad MLA

Bookman, Harvey. COBOL/370 for VS COBOL and COBOL II Programmers. McGraw-Hill, 1993.

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