Rogerson, P., & Gilbert, J. B. (1993). Speaking clearly: Pronunciation and listening comprehension for learners of English, student's book. Cambridge University Press.
Chicago-Zitierstil (17. Ausg.)Rogerson, Pamela, und Judy B. Gilbert. Speaking Clearly: Pronunciation and Listening Comprehension for Learners of English, Student's Book. Cambridge, Eng: Cambridge University Press, 1993.
MLA-Zitierstil (9. Ausg.)Rogerson, Pamela, und Judy B. Gilbert. Speaking Clearly: Pronunciation and Listening Comprehension for Learners of English, Student's Book. Cambridge University Press, 1993.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.