Gellman, I. F. (2019). Secret Affairs: Franklin Roosevelt, Cordell Hull, and Sumner Welles. Johns Hopkins University Press.
Lua i Stíl Chicago (17ú heag.)Gellman, Irwin F. Secret Affairs: Franklin Roosevelt, Cordell Hull, and Sumner Welles. Baltimore: Johns Hopkins University Press, 2019.
Lua MLA (9ú heag.)Gellman, Irwin F. Secret Affairs: Franklin Roosevelt, Cordell Hull, and Sumner Welles. Johns Hopkins University Press, 2019.
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