Potter, J. t. (2000). The Cambridge companion to singing. Cambridge University Press.
Cita Chicago (17th ed.)Potter, John tenor. The Cambridge Companion to Singing. Cambridge, UK, New York: Cambridge University Press, 2000.
Cita MLA (9th ed.)Potter, John tenor. The Cambridge Companion to Singing. Cambridge University Press, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.