Cita APA (7a ed.)

Stefan-Gruenfeldt, P., & Paul, E. (1938). Arturo Toscanini. Blue Ribbon Books.

Cita Chicago Style (17a ed.)

Stefan-Gruenfeldt, Paul, y Eden Paul. Arturo Toscanini. New York: Blue Ribbon Books, 1938.

Cita MLA (9a ed.)

Stefan-Gruenfeldt, Paul, y Eden Paul. Arturo Toscanini. Blue Ribbon Books, 1938.