APA (7th ed.) Citation

Ferreira, V. (1979). Signo Sinal. Bertrand.

Chicago Style (17th ed.) Citation

Ferreira, Vergílio. Signo Sinal. Bertrand, 1979.

MLA (8th ed.) Citation

Ferreira, Vergílio. Signo Sinal. Bertrand, 1979.

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