Cita APA (7th ed.)

Clarey, M. E., & Dixson, R. J. (1963). Pronunciation exercises in english. Simon and Schuster.

Cita Chicago (17th ed.)

Clarey, M. Elizabeth, i Robert J. Dixson. Pronunciation Exercises in English. Nueva York: Simon and Schuster, 1963.

Cita MLA (9th ed.)

Clarey, M. Elizabeth, i Robert J. Dixson. Pronunciation Exercises in English. Simon and Schuster, 1963.