Dyfyniad APA

Riordan, S. (1989). CLIO awards: A tribute to thirty years of ad- excellence 1960-1989. PBC International.

Dyfyniad Arddull Chicago

Riordan, Steve. CLIO Awards: A Tribute to Thirty Years of Ad- Excellence 1960-1989. New york: PBC International, 1989.

Dyfyniad MLA

Riordan, Steve. CLIO Awards: A Tribute to Thirty Years of Ad- Excellence 1960-1989. PBC International, 1989.

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