एपीए उद्धरण

(1997). Cambridge proficiency examination practice 1: University of Cambridge local examinations syndicate. Nxb Tp.HCM.

शिकागो स्टाइल उद्धरण

Cambridge Proficiency Examination Practice 1: University of Cambridge Local Examinations Syndicate. Nxb Tp.HCM, 1997.

एमएलए उद्धरण

Cambridge Proficiency Examination Practice 1: University of Cambridge Local Examinations Syndicate. Nxb Tp.HCM, 1997.