Grass, G. n., & Heim, M. H. (2007). Peeling the onion (First U.S. edition.). Harcourt.
Lua i Stíl Chicago (17ú heag.)Grass, G nter, agus Michael Henry Heim. Peeling the Onion. First U.S. edition. Orlando: Harcourt, 2007.
Lua MLA (9ú heag.)Grass, G nter, agus Michael Henry Heim. Peeling the Onion. First U.S. edition. Harcourt, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.