Ramaley, G. B. J. A. Essentioals of history. CV. Mosby.
Lua i Stíl Chicago (17ú heag.)Ramaley, Gerrit Bevelander Judith A. Essentioals of History. CV. Mosby.
Lua MLA (8ú heag.)Ramaley, Gerrit Bevelander Judith A. Essentioals of History. CV. Mosby.
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