Shropshire, O. E. (1930). How Europeans became Americans. Charles E. Merrill Co..
Lua i Stíl Chicago (17ú heag.)Shropshire, Olive Estil. How Europeans Became Americans. New York : Chicago: Charles E. Merrill Co., 1930.
Lua MLA (8ú heag.)Shropshire, Olive Estil. How Europeans Became Americans. Charles E. Merrill Co., 1930.
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