Sylvester, H. (2013). Sylvester, Harry, Papers. DigitalGeorgetown.
Lua i Stíl Chicago (17ú heag.)Sylvester, Harry. Sylvester, Harry, Papers. Washington, D.C.: DigitalGeorgetown, 2013.
Lua MLA (8ú heag.)Sylvester, Harry. Sylvester, Harry, Papers. DigitalGeorgetown, 2013.
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