Vernant, D. Sign conceptions in logic from the 19th century to the present: Denis Vernant. [Semiotik, 2].(1998).
Lua i Stíl Chicago (17ú heag.)Vernant, Denis. "Sign Conceptions in Logic from the 19th Century to the Present: Denis Vernant." [Semiotik, 2].(1998) .
Lua MLA (8ú heag.)Vernant, Denis. "Sign Conceptions in Logic from the 19th Century to the Present: Denis Vernant." [Semiotik, 2].(1998), .
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