Society of the Sigma XI\nScientific Research Society of America\nSigma XI, the Scientific Research Society of North America\nSigma XI, the Scientific Research Society. (1942). American Scientist. Society of the Sigma XI.
Lua i Stíl Chicago (17ú heag.)Society of the Sigma XI\nScientific Research Society of America\nSigma XI, the Scientific Research Society of North America\nSigma XI, the Scientific Research Society. American Scientist. New Haven, Conn: Society of the Sigma XI, 1942.
Lua MLA (8ú heag.)Society of the Sigma XI\nScientific Research Society of America\nSigma XI, the Scientific Research Society of North America\nSigma XI, the Scientific Research Society. American Scientist. Society of the Sigma XI, 1942.
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