Rhythm Without the Blues - Volume 1 A Comprehensive Rhythm Program for Musicians Preston Constance Kombinasjonsprodukt / 2007 / Engelsk
Rhythm Without the Blues - Volume 3 A Comprehensive Rhythm Program for Musicians Preston Constance Kombinasjonsprodukt / 2009 / Engelsk
Ear Without Fear - Volume 3 A Comprehensive Ear-Training Program for Musicians - Volume 3 Preston Constance Kombinasjonsprodukt / 2009 / Engelsk
Rhythm Without the Blues - Volume 2 A Comprehensive Rhythm Program for Musicians Preston Constance Kombinasjonsprodukt / 2008 / Engelsk
