Manning, G., & Curtis, K. (2012). The art of leadership (4th ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Manning, George, agus Kent Curtis. The Art of Leadership. 4th ed. New York: McGraw-Hill, 2012.
Lua MLA (8ú heag.)Manning, George, agus Kent Curtis. The Art of Leadership. 4th ed. McGraw-Hill, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.