4GRAHAM J W. Servant leadership in organization: Inspirational and moral.Leadership Quarterly, 1991(2):105-119.
5GREENLEAF R. The Servant as leader. Indianapolis: The Robert K GreenleafCenter, 1991:23-30.
6JOHN H HUMPHREYS. Contextual implications for transformational andservant leadership: A history investigation. Management Decision, 2005(43):1410-1427.
7LAUB J A. Assessing the servant to organization: development of theorganizational leadership assessment (OLA) instrument. Florida: Florida AtlanticUniversity, 1999.
8PAGED, WONG TP.A conceptual framework for measuring servantleadership. American: University Press of American, 2000: 456-480.
9ROB DENNIS, BRUCE EWINSTON.A factor analysis of Page andWong’ s servant leadership instrument. Leadership & Organization Development,2003(24):455-459.
10Rober J House etc, Value based leadership: An Integrated theory and anEmpirical Test, 1998,Wharton-Seminar.