8Hogg, M. A. , Fielding, K. S. , Johnson, D. , Masser, B. , Russell, E. , &Svensson, A. ( 2006 ), Demographic Category Membership and Leadership in Small Groups :A Social Identity Analysis, The Leadership Quarterly, 17:335 - 350.
9William Bloom. (1990). Personal Identity, National Identity and International Relations. Cambridge: Cambridge University Press, pp 25-53.
10Suh, E M. 2000, Self, The Hyphen Between Cuhure and Subjective Well - being, E Diener & E M Suh ( eds. ) , Culture and Subjective Well -being. Cambridge, MA: the MIT Press :63 -86.