Ridenour, F. (1967). So, What's the Difference? GL Regal Books, A Division of G/L Publicaitons.
Lua i Stíl Chicago (17ú heag.)Ridenour, Fritz. So, What's the Difference? Glendale, CA: GL Regal Books, A Division of G/L Publicaitons, 1967.
Lua MLA (9ú heag.)Ridenour, Fritz. So, What's the Difference? GL Regal Books, A Division of G/L Publicaitons, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.