Cita APA (7a ed.)

Gilbert, J. B. (1993). Clear speech: Pronunciation and listening comprehension in North American English (2.). Cambridge University.

Cita Chicago Style (17a ed.)

Gilbert, Judy B. Clear Speech: Pronunciation and Listening Comprehension in North American English. 2. New York, Estados Unidos: Cambridge University, 1993.

Cita MLA (9a ed.)

Gilbert, Judy B. Clear Speech: Pronunciation and Listening Comprehension in North American English. 2. Cambridge University, 1993.