APA aipamena

Sowton, C., & Chris Sowton. (2014). Unlock: Reading & writing skills. Cambridge: Cambridge University Press.

Chicago Style aipamena

Sowton, Chris, và Chris Sowton. Unlock: Reading & Writing Skills. Cambridge: Cambridge University Press, 2014.

MLA aipamena

Sowton, Chris, và Chris Sowton. Unlock: Reading & Writing Skills. Cambridge: Cambridge University Press, 2014.

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