APA

Goethals G. R., Sorenson G. J. & Burns J. M. (2004). Encyclopedia of leadership. London: Sage.

Chicago

Goethals George R, Sorenson Georgia J and Burns James Macgregor. 2004. Encyclopedia of leadership. London: Sage.

Harvard

Goethals G. R., Sorenson G. J. and Burns J. M. (2004). Encyclopedia of leadership. London: Sage.

MLA

Goethals George R, Sorenson Georgia J and Burns James Macgregor. Encyclopedia of leadership. London: Sage. 2004.