Berlin, I., Hardy, H., & Ignatieff, M. (2013). The hedgehog and the fox: An essay on Tolstoy's view of history (Second Edition.). Princeton University Press.
Lua i Stíl Chicago (17ú heag.)Berlin, Isaiah, Henry Hardy, agus Michael Ignatieff. The Hedgehog and the Fox: An Essay on Tolstoy's View of History. Second Edition. Princeton, New Jersey: Princeton University Press, 2013.
Lua MLA (8ú heag.)Berlin, Isaiah, et al. The Hedgehog and the Fox: An Essay on Tolstoy's View of History. Second Edition. Princeton University Press, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.