Cita APA

(1999). Focus on Proficiency. Edinburgh Gate, Halow: Addison-Wesley Longman.

Chicago Style Citation

Focus On Proficiency. Edinburgh Gate, Halow: Addison-Wesley Longman, 1999.

Cita MLA

Focus On Proficiency. Edinburgh Gate, Halow: Addison-Wesley Longman, 1999.

Atenció: Aquestes cites poden no estar 100% correctes.