Dyfyniad APA

(1976). Purnell's find out about wonders of the world. Purnell Books.

Dyfyniad Arddull Chicago

Purnell's Find Out About Wonders of the World. Maidenhead: Purnell Books, 1976.

Dyfyniad MLA

Purnell's Find Out About Wonders of the World. Purnell Books, 1976.

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