Playground and Recreation Association of America. The year book of the Playground and Recreation Association of America. Playground and Recreation Association of America.
Chicago Style (17th ed.) CitationPlayground and Recreation Association of America. The Year Book of the Playground and Recreation Association of America. New York City: Playground and Recreation Association of America.
MLA引文Playground and Recreation Association of America. The Year Book of the Playground and Recreation Association of America. Playground and Recreation Association of America.
警告：這些引文格式不一定是100％准確.