Sowell, T. (2007). A man of letters. Encounter Books.
Lua i Stíl Chicago (17ú heag.)Sowell, Thomas. A Man of Letters. New York: Encounter Books, 2007.
Lua MLA (9ú heag.)Sowell, Thomas. A Man of Letters. Encounter Books, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.