APA aipamena

Cosgrove, A. (2009). Premium (Workbook with key). Harlow: Pearson Longman.

Chicago Style aipamena

Cosgrove, Anthony. Premium (Workbook With Key). Harlow: Pearson Longman, 2009.

MLA aipamena

Cosgrove, Anthony. Premium (Workbook With Key). Harlow: Pearson Longman, 2009.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.