APA استشهاد

Gill, R. (2011). Theory and practice of leadership (2nd ed.). Sage.

استشهاد بنمط شيكاغو

Gill, Roger. Theory and Practice of Leadership. 2nd ed. Los Angeles: Sage, 2011.

MLA استشهاد

Gill, Roger. Theory and Practice of Leadership. 2nd ed. Sage, 2011.