O'Brien, R. (1990). The Story of American Toys: From the puritans to the present. New Cavendish Books.
Chicago-Zitierstil (17. Ausg.)O'Brien, Richard. The Story of American Toys: From the Puritans to the Present. London: New Cavendish Books, 1990.
MLA-Zitierstil (8. Ausg.)O'Brien, Richard. The Story of American Toys: From the Puritans to the Present. New Cavendish Books, 1990.
警告：這些引文格式不一定是100％准確.