Robert Tignor. (2008). Worlds together, worlds apart: A history of the world from the beginnings of humankind to the present. New York: W.W. Norton.
استشهاد بنمط شيكاغوRobert Tignor. Worlds Together, Worlds Apart: A History of the World From the Beginnings of Humankind to the Present. New York: W.W. Norton, 2008.
MLA استشهادRobert Tignor. Worlds Together, Worlds Apart: A History of the World From the Beginnings of Humankind to the Present. New York: W.W. Norton, 2008.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.