1. Herbert Butterfield, Individual and History, see http://archives.dailytimes.com. pk/editorial/26-Nov-2005/purple-patch-individual-and-history-herbert-butterfield; last visited on 30th March 2015.
2. Reinhold Niebuhr by Howard G. Patton, Chapter 3: Man the Sinner, A Symposium by Five Women on the Seminary Campus. (ERROR) Reinhold Niebuhr was published in 1977 by Word, Incorporated. This book was prepared for Religion Online by Harry W. and Grace C. Adams. See http://www.religion-online.org/showchapter.asp?title= 3279&C=2737
, last visited on 31st
3. Heravi, Hossein Ali, Sharhe Ghazalhaye Hafez [An Explanation of Hafez Poetry], Tehran: Tanvir Publications in cooperation with Noe Publications, Fifth Edition, 2000.
4. Hedley Bull, The Anarchical Society, London: Macmillan, pp. 77-101.
5. See Morteza Motahhari, Adle Elahi [Divine Justice], Tehran: Sadr Publications, 1982, pp. 59-67.