Cita APA (7th ed.)

Eco, U. (1997). The search for the perfect language.

Cita Chicago (17th ed.)

Eco, Umberto. The Search for the Perfect Language. Hammersmith, London, Fontana Press, an imprint of HarperCollinsPublishers, 1997.

Cita MLA (9th ed.)

Eco, Umberto. The Search for the Perfect Language. 1997.