एपीए उद्धरण

Hart,Guy Brook, & Lê Huy Lâm. (2004). Cambridge instant ielts: Ready to use tasks and activities. HCM: NXB tổng hợp.

शिकागो स्टाइल उद्धरण

Hart,Guy Brook, और Lê Huy Lâm. Cambridge Instant Ielts: Ready to Use Tasks and Activities. HCM: NXB tổng hợp, 2004.

एमएलए उद्धरण

Hart,Guy Brook, और Lê Huy Lâm. Cambridge Instant Ielts: Ready to Use Tasks and Activities. HCM: NXB tổng hợp, 2004.