Gaya APA

Bentley, J, H., Ziegler, H, F. (2011). Traditions and encounters : a global perspective on the past . New York: Mc Graw Hill.

Gaya MLA

Bentley, Jerry, H.., Ziegler, Herbert, F.. "Traditions and encounters : a global perspective on the past". New York: Mc Graw Hill, 2011. Text.