Richards, E. (2009). Melody & Rhythm permutatios: More than 300 exercises for mallets and other instruments. Hal Leonard Corporation.
芝加哥风格引文Richards, Emil. Melody & Rhythm Permutatios: More than 300 Exercises for Mallets and Other Instruments. Australia: Hal Leonard Corporation, 2009.
MLA引文Richards, Emil. Melody & Rhythm Permutatios: More than 300 Exercises for Mallets and Other Instruments. Hal Leonard Corporation, 2009.
警告：这些引文格式不一定是100％准确.