Cita APA (7a ed.)

Baker, A. (1990). Introducing English pronunciation: A teacher's guide to tree or three? and ship or sheep? (1st published, 7th printing.). Cambridge University Press.

Cita Chicago Style (17a ed.)

Baker, Ann. Introducing English Pronunciation: A Teacher's Guide to Tree or Three? and Ship or Sheep? 1st published, 7th printing. Cambridge [etc.]: Cambridge University Press, 1990.

Cita MLA (9a ed.)

Baker, Ann. Introducing English Pronunciation: A Teacher's Guide to Tree or Three? and Ship or Sheep? 1st published, 7th printing. Cambridge University Press, 1990.