Williamson, T., & O'Hear, A. (2009). Knowledge of counterfactuals. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Williamson, T., agus A. O'Hear. Knowledge of Counterfactuals. Cambridge University Press, 2009.
Lua MLA (9ú heag.)Williamson, T., agus A. O'Hear. Knowledge of Counterfactuals. Cambridge University Press, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.