Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.