Lougheed, L. (2011). Ielts International English Languages Testing System. Nhân Trí Việt.
Chicago Style CitationLougheed, Lin. Ielts International English Languages Testing System. Nhân Trí Việt, 2011.
Cita MLALougheed, Lin. Ielts International English Languages Testing System. Nhân Trí Việt, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.