Jeffrey Pfeffer. (2019). Power. Harper Business.
Lua i Stíl Chicago (17ú heag.)Jeffrey Pfeffer. Power. Harper Business, 2019.
Lua MLA (9ú heag.)Jeffrey Pfeffer. Power. Harper Business, 2019.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.