Dyfyniad APA

(2001). Work in progress. Fundação Calouste Gulbenkian.

Dyfyniad Arddull Chicago

Work in Progress. Fundação Calouste Gulbenkian, 2001.

Dyfyniad MLA

Work in Progress. Fundação Calouste Gulbenkian, 2001.

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