APA-referens (7:e uppl.)

Harrison, S. D., & O'Bryan, J. (2014). Teaching singing in the 21st century. Springer.

Chicago-referens (17:e uppl.)

Harrison, Scott David, och Jessica O'Bryan. Teaching Singing in the 21st Century. Dordrecht: Springer, 2014.

MLA-referens (9:e uppl.)

Harrison, Scott David, och Jessica O'Bryan. Teaching Singing in the 21st Century. Springer, 2014.