I. C. B. DEAR and M. R. D. FOOT. "Papen, Franz von." The Oxford Companion to World War II. Oxford University Press. 2001. Encyclopedia.com. 10 Nov. 2009 <http://www.encyclopedia.com>.
I. C. B. DEAR and M. R. D. FOOT. "Papen, Franz von." The Oxford Companion to World War II. Oxford University Press. 2001. Encyclopedia.com. (November 10, 2009). http://www.encyclopedia.com/doc/1O129-PapenFranzvon.html
I. C. B. DEAR and M. R. D. FOOT. "Papen, Franz von." The Oxford Companion to World War II. Oxford University Press. 2001. Retrieved November 10, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O129-PapenFranzvon.html