Duncan, W. H. (2013). Duncan, William H., SJ, Papers. DigitalGeorgetown.
Lua i Stíl Chicago (17ú heag.)Duncan, William H. Duncan, William H., SJ, Papers. Washington, D.C.: DigitalGeorgetown, 2013.
Lua MLA (8ú heag.)Duncan, William H. Duncan, William H., SJ, Papers. DigitalGeorgetown, 2013.
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