Dyfyniad APA

Quarterly Survey of Advertising Expenditure. Ascential Events (Europe) Limited.

Dyfyniad Arddull Chicago

Quarterly Survey of Advertising Expenditure. Ascential Events (Europe) Limited.

Dyfyniad MLA

Quarterly Survey of Advertising Expenditure. Ascential Events (Europe) Limited.

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