Dyfyniad APA

RIES AL. (2002). FALL OF ADVERTISING AND THE RISE OF PR. HARPER COLLINS PUBLISHERS.

Dyfyniad Arddull Chicago

RIES AL. FALL OF ADVERTISING AND THE RISE OF PR. NEW YORK: HARPER COLLINS PUBLISHERS, 2002.

Dyfyniad MLA

RIES AL. FALL OF ADVERTISING AND THE RISE OF PR. HARPER COLLINS PUBLISHERS, 2002.

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