Dyfyniad APA

Steinbeck, J. (1994). Once there was a war. Penguin Books.

Dyfyniad Arddull Chicago

Steinbeck, John. Once There Was a War. London: Penguin Books, 1994.

Dyfyniad MLA

Steinbeck, John. Once There Was a War. Penguin Books, 1994.

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