Davidson, G. (2003). Verbs and tenses. Singapore: Learners Publishing Pte Ltd.
Dyfyniad Arddull ChicagoDavidson, George. Verbs and Tenses. Singapore: Learners Publishing Pte Ltd, 2003.
Dyfyniad MLADavidson, George. Verbs and Tenses. Singapore: Learners Publishing Pte Ltd, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.