Dyfyniad APA

AEA Papers and Proceedings. American Economic Association.

Dyfyniad Arddull Chicago

AEA Papers and Proceedings. American Economic Association.

Dyfyniad MLA

AEA Papers and Proceedings. American Economic Association.

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