(1931). The Playthings Directory of the Toy Industry 1931. McCready Publishing Company.
Lua i Stíl Chicago (17ú heag.)The Playthings Directory of the Toy Industry 1931. New York: McCready Publishing Company, 1931.
Lua MLA (8ú heag.)The Playthings Directory of the Toy Industry 1931. McCready Publishing Company, 1931.
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