Dyfyniad APA

HELD GILBERT. (1987). IBM PC AND PC XT USER`S REFERENCE MANUAL (2.). BPB PUBLICATIONS.

Dyfyniad Arddull Chicago

HELD GILBERT. IBM PC AND PC XT USER`S REFERENCE MANUAL. 2. DELHI: BPB PUBLICATIONS, 1987.

Dyfyniad MLA

HELD GILBERT. IBM PC AND PC XT USER`S REFERENCE MANUAL. 2. BPB PUBLICATIONS, 1987.

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