एपीए उद्धरण

Cambridge University. (2013). Cambridge Certificate in Advanced English 1 with answers. United Kingdom: Cambridge university Press.

शिकागो स्टाइल उद्धरण

Cambridge University. Cambridge Certificate in Advanced English 1 With Answers. United Kingdom: Cambridge university Press, 2013.

एमएलए उद्धरण

Cambridge University. Cambridge Certificate in Advanced English 1 With Answers. United Kingdom: Cambridge university Press, 2013.