Citazione APA

Gilbert, J. B., & Judy B. Gilbert. (1993). Clear speech: Pronunciation and Listening Comprehension in North American English : student's book. Cambridge: Cambridge University Press.

Stile di citazione Chicago

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

Citazione MLA

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

Attenzione: Queste citazioni potrebbero non essere precise al 100%.