Gavian, R. W., Hamm, W. A., & Freidel, F. B. (1965). United States history (Rev.). D.C. Heath.
Lua i Stíl Chicago (17ú heag.)Gavian, Ruth Wood, William Albert Hamm, agus Frank Burt Freidel. United States History. Rev. Boston: D.C. Heath, 1965.
Lua MLA (8ú heag.)Gavian, Ruth Wood, et al. United States History. Rev. D.C. Heath, 1965.
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