Cita APA

Le Roy, P. J., & Le Roy, P. J. (1941). How to play the piano by ear: The quick, easy, simple way. New York: Sun Dial Pres.

Citación estilo Chicago

Le Roy, Perry J., y Perry J. Le Roy. How to Play the Piano By Ear: The Quick, Easy, Simple Way. New York: Sun Dial Pres, 1941.

Cita MLA

Le Roy, Perry J., y Perry J. Le Roy. How to Play the Piano By Ear: The Quick, Easy, Simple Way. New York: Sun Dial Pres, 1941.