Dyfyniad APA

Cambridge Educational Research e-Journal | University of Cambridge. Cambridge University Press.

Dyfyniad Arddull Chicago

Cambridge Educational Research E-Journal | University of Cambridge. Cambridge University Press.

Dyfyniad MLA

Cambridge Educational Research E-Journal | University of Cambridge. Cambridge University Press.

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