IMS LEARNING. (2004). ENHANCE YOUR ENGLISH PROFICIENCY. ISI.
Cita Chicago (17th ed.)IMS LEARNING. ENHANCE YOUR ENGLISH PROFICIENCY. MUMBAI: ISI, 2004.
Cita MLA (9th ed.)IMS LEARNING. ENHANCE YOUR ENGLISH PROFICIENCY. ISI, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.