Fitzgerald, J. J. Peirce's doctrine of symbol: John J. Fitzgerald. Peirce's doctrine of signs : theory, applications, and connections.(1996).
Lua i Stíl Chicago (17ú heag.)Fitzgerald, John J. "Peirce's Doctrine of Symbol: John J. Fitzgerald." Peirce's Doctrine of Signs : Theory, Applications, and Connections.(1996) .
Lua MLA (8ú heag.)Fitzgerald, John J. "Peirce's Doctrine of Symbol: John J. Fitzgerald." Peirce's Doctrine of Signs : Theory, Applications, and Connections.(1996), .
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