Krüttli, R. (1999). Training with Bach: Roland Krüttli (Dt. Version.). Difem.
Lua i Stíl Chicago (17ú heag.)Krüttli, Roland. Training with Bach: Roland Krüttli. Dt. Version. La Chaux-du-Milieu: Difem, 1999.
Lua MLA (8ú heag.)Krüttli, Roland. Training with Bach: Roland Krüttli. Dt. Version. Difem, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.