Baker, A., & Goldstein, S. (2008). Pronunciation pairs: An introduction to the sounds of english (Second edition.). Cambridge University Press.

Baker, Ann, and Sharon Goldstein. Pronunciation Pairs: An Introduction to the Sounds of English. Second edition. Cambridge: Cambridge University Press, 2008.

Baker, Ann, and Sharon Goldstein. Pronunciation Pairs: An Introduction to the Sounds of English. Second edition. Cambridge University Press, 2008.