O'Brien, R. (1990). The Story of American Toys: From the puritans to the present. New Cavendish Books.
Chicago-viite (17. p.)O'Brien, Richard. The Story of American Toys: From the Puritans to the Present. London: New Cavendish Books, 1990.
MLA-viite (8. p.)O'Brien, Richard. The Story of American Toys: From the Puritans to the Present. New Cavendish Books, 1990.
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