Wolf, S. R. (1990). Freedom within reason. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Wolf, Susan R. Freedom Within Reason. New York: Oxford University Press, 1990.
Lua MLA (9ú heag.)Wolf, Susan R. Freedom Within Reason. Oxford University Press, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.