एपीए उद्धरण

Lougheed, L., & Lin Lougheed. (2007). Barron's IELTS: International english language testing system. Tp. Hồ Chí Minh: Trẻ.

शिकागो स्टाइल उद्धरण

Lougheed, Lin, और Lin Lougheed. Barron's IELTS: International English Language Testing System. Tp. Hồ Chí Minh: Trẻ, 2007.

एमएलए उद्धरण

Lougheed, Lin, और Lin Lougheed. Barron's IELTS: International English Language Testing System. Tp. Hồ Chí Minh: Trẻ, 2007.