Gaya APA

Qxenden, C., Latham-koenig, C. (2008). New English file : Upper-intermediate student's book . Oxford: OXFORD UNIVERSITY PRESS.

Gaya MLA

Qxenden, Clive., Latham-koenig, Christina. "New English file : Upper-intermediate student's book". Oxford: OXFORD UNIVERSITY PRESS, 2008. Text.