Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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