“…The following is a review of the authors and/or studies on leadership that support the two-factor theory: (a) Ohio State Leadership Studies (e.g., Schriesheim and Bird, 1979;Shartle, 1979;Stogdill and Shartle, 1953), (b) Michigan Leadership Studies (e.g., Daft, 1994;Katz and Kahn, 1952;Likert, 1961;Likert, 1967;Likert, 1979), (c) Group Dynamic Studies (e.g., Cartwright and Zander, 1960;Hersey, Blanchard and Johnson, 1996;Lewin, Lippitt and White, 1939), (d) Rensis Likert's Management Systems (e.g., Hersey, Blanchard and Johnson, 1996;Likert, 1967), (e) Tannenbaum and Schmidt's Leadership Continuum (e.g., Hersey, Blanchard and Johnson, 1996;Tannenbaum and Schmidt, 1973), (f) the Leadership Grid (e.g., Blake and Mouton, 1985;Carlson, 1996;Hersey, Blanchard and Johnson, 1996), (g) Stinson-Johnson Model (e.g., Hersey, Blanchard and Johnson, 1996), and (h) Burn's Transactional and Transformational Theory (e.g., Burns, 1978).…”