Hansen, A. H. (1946). America's role in the world economy. Penguin Books.
Lua i Stíl Chicago (17ú heag.)Hansen, Alvin H. America's Role in the World Economy. New York: Penguin Books, 1946.
Lua MLA (9ú heag.)Hansen, Alvin H. America's Role in the World Economy. Penguin Books, 1946.
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