Dyfyniad APA

Hoyle, F., & Holey, G. (1963). Fifth planet. Penguin Books.

Dyfyniad Arddull Chicago

Hoyle, Fred, and Geoffrey Holey. Fifth Planet. Harmondsworth: Penguin Books, 1963.

Dyfyniad MLA

Hoyle, Fred, and Geoffrey Holey. Fifth Planet. Penguin Books, 1963.

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