原文: In Tune Magazine April 2015. Why Small Amps Are a Big Deal. When Drumming is the Family Business. 42 pages. HL.77772163.
译文: In Tune Magazine April 2015 in Tune. 42页. 出版哈尔伦纳德. In Tune Magazine – April 2015 Cover Stories. Voice-ercise Warm-Ups for Singers.