Gill, R. (2012). Theory and Practice of Leadership (2nd ed.). SAGE Publications India Pvt. Ltd.
Lua i Stíl Chicago (17ú heag.)Gill, Roger. Theory and Practice of Leadership. 2nd ed. New Delhi: SAGE Publications India Pvt. Ltd, 2012.
Lua MLA (9ú heag.)Gill, Roger. Theory and Practice of Leadership. 2nd ed. SAGE Publications India Pvt. Ltd, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.