(1999). Knockout frist certificate: Student book. Oxford: Oxford University Press.
शिकागो स्टाइल उद्धरणKnockout Frist Certificate: Student Book. Oxford: Oxford University Press, 1999.
एमएलए उद्धरणKnockout Frist Certificate: Student Book. Oxford: Oxford University Press, 1999.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.