एपीए उद्धरण

DEARDEN, P. :. M. ENVIRONMENTAL Change and Challenge. Oxford Univerasity Press.

शिकागो स्टाइल उद्धरण

DEARDEN, Philip : MITCHELL. ENVIRONMENTAL Change and Challenge. Oxford: Oxford Univerasity Press.

एमएलए उद्धरण

DEARDEN, Philip : MITCHELL. ENVIRONMENTAL Change and Challenge. Oxford Univerasity Press.