APA引文

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

Chicago Edition Citation

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

MLA引文

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

警告：這些引文格式不一定是100％准確.