एपीए उद्धरण

Lougheed, L. (2012). IELTS practice exams. Tp. HCM: Tổng hợp.

शिकागो स्टाइल उद्धरण

Lougheed, Lin. IELTS Practice Exams. Tp. HCM: Tổng hợp, 2012.

एमएलए उद्धरण

Lougheed, Lin. IELTS Practice Exams. Tp. HCM: Tổng hợp, 2012.