APA
Baker A., . (2006). Tree or three? : an elementary pronunciation course. Cambridge: Cambridge University Press.
Chicago
Baker Ann, . 2006. Tree or three? : an elementary pronunciation course. Cambridge: Cambridge University Press.
Harvard
Baker A., . (2006). Tree or three? : an elementary pronunciation course. Cambridge: Cambridge University Press.
MLA
Baker Ann, . Tree or three? : an elementary pronunciation course. Cambridge: Cambridge University Press. 2006.