एपीए उद्धरण

Humphreys, P. (2006). IELTS express: Intermediate. London: Thomson.

शिकागो स्टाइल उद्धरण

Humphreys, Pamela. IELTS Express: Intermediate. London: Thomson, 2006.

एमएलए उद्धरण

Humphreys, Pamela. IELTS Express: Intermediate. London: Thomson, 2006.