Cita APA (7th ed.)

Higgins, L., & Campbell, P. S. (2010). Free to be musical: Group improvisation in music. Rowman & Littlefield Education.

Cita Chicago (17th ed.)

Higgins, Lee, i Patricia Shehan Campbell. Free to Be Musical: Group Improvisation in Music. Lanham, MD: Rowman & Littlefield Education, 2010.

Cita MLA (9th ed.)

Higgins, Lee, i Patricia Shehan Campbell. Free to Be Musical: Group Improvisation in Music. Rowman & Littlefield Education, 2010.