Παραπομπή σε μορφή APA (7η εκδ.)

Fitzgerald, J. J. Peirce's doctrine of symbol: John J. Fitzgerald. Peirce's doctrine of signs : theory, applications, and connections.(1996).

Παραπομπή σε μορφή Chicago (17η εκδ.)

Fitzgerald, John J. "Peirce's Doctrine of Symbol: John J. Fitzgerald." Peirce's Doctrine of Signs : Theory, Applications, and Connections.(1996) .

Παραπομπή σε μορφή MLA (8th εκδ.)

Fitzgerald, John J. "Peirce's Doctrine of Symbol: John J. Fitzgerald." Peirce's Doctrine of Signs : Theory, Applications, and Connections.(1996), .