APA (7th ed.) Citation

Gilbert, J. B. (1993). Clear speech: Pronunciation and listening comprehension in North American english, student's book (2a. ed.). Cambridge University Press.

Chicago Style (17th ed.) Citation

Gilbert, Judy B. Clear Speech: Pronunciation and Listening Comprehension in North American English, Student's Book. 2a. ed. Nueva York: Cambridge University Press, 1993.

MLA (9th ed.) Citation

Gilbert, Judy B. Clear Speech: Pronunciation and Listening Comprehension in North American English, Student's Book. 2a. ed. Cambridge University Press, 1993.