APA aipamena

Boyd, E. (2009). Premium: C1 level (Coursebook). Harlow (England): Pearson education limited.

Chicago Style aipamena

Boyd, Elaine. Premium: C1 Level (Coursebook). Harlow (England): Pearson education limited, 2009.

MLA aipamena

Boyd, Elaine. Premium: C1 Level (Coursebook). Harlow (England): Pearson education limited, 2009.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.