एपीए उद्धरण

(2008). Worlds together, worlds apart: A history of the world from the beginnings of humankind to the present. New York: W.W. Norton.

शिकागो स्टाइल उद्धरण

Worlds Together, Worlds Apart: A History of the World From the Beginnings of Humankind to the Present. New York: W.W. Norton, 2008.

एमएलए उद्धरण

Worlds Together, Worlds Apart: A History of the World From the Beginnings of Humankind to the Present. New York: W.W. Norton, 2008.