Cita APA (7th ed.)

IMS publications. (2007). Enhance your english proficiency (2nd.). IMS Publications.

Cita Chicago (17th ed.)

IMS publications. Enhance Your English Proficiency. 2nd. Mumbai: IMS Publications, 2007.

Cita MLA (9th ed.)

IMS publications. Enhance Your English Proficiency. 2nd. IMS Publications, 2007.