Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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