Clarey, M. E., & Dixson, R. J. (1963). Pronunciation exercises in English: Including drills for the correction of faulty accent and intonation (Rev. ed.). New York: Regents Pub. Co..

Clarey, M. Elizabeth., و Robert James Dixson. Pronunciation Exercises in English: Including Drills for the Correction of Faulty Accent and Intonation. Rev. ed. New York: Regents Pub. Co., 1963.

Clarey, M. Elizabeth., و Robert James Dixson. Pronunciation Exercises in English: Including Drills for the Correction of Faulty Accent and Intonation. Rev. ed. New York: Regents Pub. Co., 1963.