Cita APA (7a ed.)

Klima, E. S., & Bellugi, U. (1979). The signs of language. Harvard University Press.

Cita Chicago Style (17a ed.)

Klima, Edward S., y Ursula Bellugi. The Signs of Language. Cambridge (Massachusetts) [etc.]: Harvard University Press, 1979.

Cita MLA (9a ed.)

Klima, Edward S., y Ursula Bellugi. The Signs of Language. Harvard University Press, 1979.