Hart,Guy Brook, & Lê Huy Lâm. (2004). Cambridge instant ielts: Ready to use tasks and activities. HCM: NXB tổng hợp.
शिकागो स्टाइल उद्धरणHart,Guy Brook, और Lê Huy Lâm. Cambridge Instant Ielts: Ready to Use Tasks and Activities. HCM: NXB tổng hợp, 2004.
एमएलए उद्धरणHart,Guy Brook, और Lê Huy Lâm. Cambridge Instant Ielts: Ready to Use Tasks and Activities. HCM: NXB tổng hợp, 2004.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.