Baker, A. (1991). Tree or Three?: An Elementary Pronunciation Course. Cambridge: Cambridge University.
Chicago Style aipamenaBaker, Ann. Tree or Three?: An Elementary Pronunciation Course. Cambridge: Cambridge University, 1991.
MLA aipamenaBaker, Ann. Tree or Three?: An Elementary Pronunciation Course. Cambridge: Cambridge University, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.