Dyfyniad APA

Llewellyn, R. (1942). How green was my valley. Michael Joseph.

Dyfyniad Arddull Chicago

Llewellyn, Richard. How Green Was My Valley. London: Michael Joseph, 1942.

Dyfyniad MLA

Llewellyn, Richard. How Green Was My Valley. Michael Joseph, 1942.

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