Higgins, L., & Campbell, P. S. (2010). Free to be musical: Group improvisation in music. Rowman & Littlefield Education.
芝加哥风格引文Higgins, Lee, 与 Patricia Shehan Campbell. Free to Be Musical: Group Improvisation in Music. Lanham, MD: Rowman & Littlefield Education, 2010.
MLA引文Higgins, Lee, 与 Patricia Shehan Campbell. Free to Be Musical: Group Improvisation in Music. Rowman & Littlefield Education, 2010.
警告：这些引文格式不一定是100％准确.