Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.