Maley, A., & Duff, A. (1979). Sounds Interesting (1st ed., 2nd repr.). Cambridge University Press.
Cita Chicago Style (17a ed.)Maley, Alan, y Alan Duff. Sounds Interesting. 1st ed., 2nd repr. Cambridge: Cambridge University Press, 1979.
Cita MLA (9a ed.)Maley, Alan, y Alan Duff. Sounds Interesting. 1st ed., 2nd repr. Cambridge University Press, 1979.
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