Lamb, W. (1999). I know this much is true (1st pbk. ed.). Regan Books.
Lua i Stíl Chicago (17ú heag.)Lamb, Wally. I Know This Much Is True. 1st pbk. ed. New York, NY: Regan Books, 1999.
Lua MLA (8ú heag.)Lamb, Wally. I Know This Much Is True. 1st pbk. ed. Regan Books, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.