एपीए उद्धरण

(1999). Life lines 1: Pre- Intermediate. Oxford: Oxford University Press.

शिकागो स्टाइल उद्धरण

Life Lines 1: Pre- Intermediate. Oxford: Oxford University Press, 1999.

एमएलए उद्धरण

Life Lines 1: Pre- Intermediate. Oxford: Oxford University Press, 1999.