Gaya APA

Tignor, R. (2008). Wordls together worlds apart : A History if the world from the beginnings of humanikind to the present . New York: W.W. Norton Company.

Gaya MLA

Tignor, Robert. "Wordls together worlds apart : A History if the world from the beginnings of humanikind to the present". New York: W.W. Norton Company, 2008. Text.