एपीए उद्धरण

(2015). Cambridge English FIRST 1: First certificate in english with answers.

शिकागो स्टाइल उद्धरण

Cambridge English FIRST 1: First Certificate in English With Answers. 2015.

एमएलए उद्धरण

Cambridge English FIRST 1: First Certificate in English With Answers. 2015.