APA (7th ed.) Citation

Eco, U., & Malvinni, P. D. (1991). Vocali. Guida.

Chicago Style (17th ed.) Citation

Eco, Umberto, and Paolo D. Malvinni. Vocali. Napoli: Guida, 1991.

MLA (9th ed.) Citation

Eco, Umberto, and Paolo D. Malvinni. Vocali. Guida, 1991.

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