एपीए उद्धरण

William Ruddiman. (2008). Earth's Climate: Past and Future. W.H.Freeman.

शिकागो स्टाइल उद्धरण

William Ruddiman. Earth's Climate: Past and Future. W.H.Freeman, 2008.

एमएलए उद्धरण

William Ruddiman. Earth's Climate: Past and Future. W.H.Freeman, 2008.