Wittenberg, W. H. (1985). Indentifying interferences: Booklet A. Barnell Loft.
Lua i Stíl Chicago (17ú heag.)Wittenberg, William H. Indentifying Interferences: Booklet A. Baldwin, NY: Barnell Loft, 1985.
Lua MLA (9ú heag.)Wittenberg, William H. Indentifying Interferences: Booklet A. Barnell Loft, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.