APA aipamena

Donaghue, H., & Potter, H. (2000). Clockwise: Upper-intermediate. Teacher's resource Pack. Oxford: Oxford Univ. Press.

Chicago Style aipamena

Donaghue, Helen, và Heather Potter. Clockwise: Upper-intermediate. Teacher's Resource Pack. Oxford: Oxford Univ. Press, 2000.

MLA aipamena

Donaghue, Helen, và Heather Potter. Clockwise: Upper-intermediate. Teacher's Resource Pack. Oxford: Oxford Univ. Press, 2000.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.