Dyfyniad APA

PARR WILLIAM M. (1984). EXCUTIVE`S GUIDE TO EFFECTIVE LETTERS & REPORTS. TARAPOREVALA PUBLICATIONS.

Dyfyniad Arddull Chicago

PARR WILLIAM M. EXCUTIVE`S GUIDE TO EFFECTIVE LETTERS & REPORTS. BOMBAY: TARAPOREVALA PUBLICATIONS, 1984.

Dyfyniad MLA

PARR WILLIAM M. EXCUTIVE`S GUIDE TO EFFECTIVE LETTERS & REPORTS. TARAPOREVALA PUBLICATIONS, 1984.

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