Dyfyniad APA

Douglas, D. (2010). Understanding language testing. Hodder Education.

Dyfyniad Arddull Chicago

Douglas, Dan. Understanding Language Testing. London: Hodder Education, 2010.

Dyfyniad MLA

Douglas, Dan. Understanding Language Testing. Hodder Education, 2010.

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