एपीए उद्धरण

Palley, J. (2011). 31 High - Scoring Formulas to Answer the Ielts Speaking Questions. HCM: Tổng hợp.

शिकागो स्टाइल उद्धरण

Palley, Jonathan. 31 High - Scoring Formulas to Answer the Ielts Speaking Questions. HCM: Tổng hợp, 2011.

एमएलए उद्धरण

Palley, Jonathan. 31 High - Scoring Formulas to Answer the Ielts Speaking Questions. HCM: Tổng hợp, 2011.