एपीए उद्धरण

Ireland, S. (2010). PET Direct student's book. Cambridge University Press.

शिकागो स्टाइल उद्धरण

Ireland, Sue. PET Direct Student's Book. Cambridge University Press, 2010.

एमएलए उद्धरण

Ireland, Sue. PET Direct Student's Book. Cambridge University Press, 2010.