APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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