Dyfyniad APA

(2001). Communications outlook 2001. OECD Publications Services.

Dyfyniad Arddull Chicago

Communications Outlook 2001. Paris, France: OECD Publications Services, 2001.

Dyfyniad MLA

Communications Outlook 2001. OECD Publications Services, 2001.

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