एपीए उद्धरण

Gairns, R., & Redman, S. (2005). Natural english: Pre - intermediate student's book. Oxford: Oxford Univ. Press.

शिकागो स्टाइल उद्धरण

Gairns, Ruth, और Stuart Redman. Natural English: Pre - Intermediate Student's Book. Oxford: Oxford Univ. Press, 2005.

एमएलए उद्धरण

Gairns, Ruth, और Stuart Redman. Natural English: Pre - Intermediate Student's Book. Oxford: Oxford Univ. Press, 2005.