O'Brien, R. (1990). The Story of American Toys: From the puritans to the present. New Cavendish Books.
Citazione stile Chigago Style (17a edizione)O'Brien, Richard. The Story of American Toys: From the Puritans to the Present. London: New Cavendish Books, 1990.
Citatione MLA (8a ed.)O'Brien, Richard. The Story of American Toys: From the Puritans to the Present. New Cavendish Books, 1990.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.