O'Brien, R. (1990). The Story of American Toys: From the puritans to the present. New Cavendish Books.
Cita Chicago (17th ed.)O'Brien, Richard. The Story of American Toys: From the Puritans to the Present. London: New Cavendish Books, 1990.
Cita MLA (8th ed.)O'Brien, Richard. The Story of American Toys: From the Puritans to the Present. New Cavendish Books, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.