(1976). Purnell's find out about wonders of the world. Purnell Books.
シカゴスタイル引用形Purnell's Find Out About Wonders of the World. Maidenhead: Purnell Books, 1976.
MLA引用形式Purnell's Find Out About Wonders of the World. Purnell Books, 1976.
警告: この引用は必ずしも正確ではありません.