Παραπομπή APA

Day, J., & Jeremy Day. (2014). Unlock: Listening and speaking skills. Cambridge: Cambridge University Press.

Παραπομπή Chicago Style

Day, Jeremy, και Jeremy Day. Unlock: Listening and Speaking Skills. Cambridge: Cambridge University Press, 2014.

Παραπομπή MLA

Day, Jeremy, και Jeremy Day. Unlock: Listening and Speaking Skills. Cambridge: Cambridge University Press, 2014.

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