Cita APA (7th ed.)

Baker, A. (2006). Tree or Three?: An elementary pronunciation course (2a. ed.). Cambridge University Press.

Cita Chicago (17th ed.)

Baker, Ann. Tree or Three?: An Elementary Pronunciation Course. 2a. ed. Cambridge University Press, 2006.

Cita MLA (9th ed.)

Baker, Ann. Tree or Three?: An Elementary Pronunciation Course. 2a. ed. Cambridge University Press, 2006.