2.0 Introduction Most of researches on leadership had been focused on the characteristics of the leader and his impact on the organization since 1980s. From the research, it shows that leaderships have direct effects on managing the organization in term of decision making processes, which will directly affect on the result of organizations. Nevertheless, studies also confirmed that the leadership style affects group work processes. There is no single definition for leadership. According to Stogdill, an authoritative source of leadership theory, he defined leadership
References: Barbuto, J. E. (2005). Motivation and Transactional, Charismatic, and Transformational Leadership: A Test of Antecedents. Retrieved March 2nd, 2013, from http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1038&context=aglecfacpub&seiredir=1&referer=http%3A%2F%2Fwww.google.com.my%2Furl%3Fsa%3Dt%26rct%3Dj%26q%3Dfree%2520journal%2520transformational%2520and%2520transactional%2520leadership%26source%3Dweb%26cd%3D11%26cad%3Drja%26ved%3D0CDcQFjAAOAo%26url%3Dhttp%253A%252F%252Fdigitalcommons.unl.edu%252Fcgi%252Fviewcontent.cgi%253Farticle%253D1038%2526context%253Daglecfacpub%26ei%3DsjA4UYXhG42zrAeRrIGYCQ%26usg%3DAFQjCNF7cUqDB_HPxAIjjZbglFN2LwlQ%26bvm%3Dbv.43287494%2Cd.bmk#search=%22free%20journal%20transformational%20transactional%20leadership%22 Bertocci, D. I. (2009). Leadership in organizations: there is a difference between leadears and managers. United States of America: University Press of America, Inc. Retrieved March 2nd, 2013, from http://books.google.com.my/books?id=mlMrKJ2CdyYC&printsec=frontcover&dq=Managers,+leadership,+managing+organization&hl=en&sa=X&ei=TkQmUYb0CYTmrAefxYHgBA&ved=0CEYQ6AEwBA#v=onepage&q=Managers%2C%20leadership%2C%20managing%20organization&f=false Core leadership theories: learning the foundations of leadership. (2013). Retrieved March 4th, 2013, from http://www.mindtools.com/pages/article/leadership-theories.htm Ekaterini, G. (2010). International journal of business and management. The impact of leadership styles on four variables of executives workforce. 5(6). Retrieved March 3rd, 2013, from http://ccsenet.org/journal/index.php/ijbm/article/viewFile/5448/4900%20rel= Goertzen, B. J. (n.d.). Contemporary theories of leadership. Retrieved March 2nd, 2013, from http://samples.jbpub.com/9780763781507/81507_CH06_Printer.pdf Hartog, D. N. D., Muijen, J. J. V., and Paul L. Koopman. (1997). Journal of occupational and organizational psychology. Transational verus transformational leadership: an analysis of the MLQ, 70, 19-34. Retrieved March 3rd, 2013, from http://cyb.ox.or.kr/lms_board/bbs_upload/Transactional......pdf Lin, L. (2010). Leadership styles: transactional leadership. Retrieved March 4th, 2013, from http://psychology.about.com/od/leadership/p/leadtheories.htm Warrik, D. D. (1981). Leadership styles ad their consequences. Journal of experiential learning and simulation, 3-4: 155-172. Retrieved March 3rd, 2013, from http://sbaweb.wayne.edu/~absel/bkl/.%5Cjels%5C3-3d.pdf