एपीए उद्धरण

Metcalf, R., & Rob Metcalf; Chris Cavey; Alison Greenwood. (2011). English unlimited. B2, Upper Intermediate Self-study Pack. Cambridge: Cambridge University Press.

शिकागो स्टाइल उद्धरण

Metcalf, Rob, और Rob Metcalf; Chris Cavey; Alison Greenwood. English Unlimited. B2, Upper Intermediate Self-study Pack. Cambridge: Cambridge University Press, 2011.

एमएलए उद्धरण

Metcalf, Rob, और Rob Metcalf; Chris Cavey; Alison Greenwood. English Unlimited. B2, Upper Intermediate Self-study Pack. Cambridge: Cambridge University Press, 2011.