APA (7th ed.) Citation

Ferreira, V. (1979). Signo sinal. Bertrand Editora.

Chicago Style (17th ed.) Citation

Ferreira, Vergílio. Signo Sinal. Bertrand Editora, 1979.

MLA (8th ed.) Citation

Ferreira, Vergílio. Signo Sinal. Bertrand Editora, 1979.

Warning: These citations may not always be 100% accurate.