Richards, E. (2009). Melody & Rhythm permutatios: More than 300 exercises for mallets and other instruments. Hal Leonard Corporation.
Chicago-referens (17:e uppl.)Richards, Emil. Melody & Rhythm Permutatios: More than 300 Exercises for Mallets and Other Instruments. Australia: Hal Leonard Corporation, 2009.
MLA-referens (8:e uppl.)Richards, Emil. Melody & Rhythm Permutatios: More than 300 Exercises for Mallets and Other Instruments. Hal Leonard Corporation, 2009.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.