Berlin, I., & Hardy, H. (2000). The power of ideas. Princeton University Press.
Lua i Stíl Chicago (17ú heag.)Berlin, Isaiah, agus Henry Hardy. The Power of Ideas. Princeton: Princeton University Press, 2000.
Lua MLA (9ú heag.)Berlin, Isaiah, agus Henry Hardy. The Power of Ideas. Princeton University Press, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.