एपीए उद्धरण

OConnell, S. (1993). Advanced English C.A.E practice tests with guidance. England: Longman.

शिकागो स्टाइल उद्धरण

OConnell, Sue. Advanced English C.A.E Practice Tests With Guidance. England: Longman, 1993.

एमएलए उद्धरण

OConnell, Sue. Advanced English C.A.E Practice Tests With Guidance. England: Longman, 1993.