Schubert, F. P. (1999). Who is Sylvia: Song. Music Sales.
Cita Chicago (17th ed.)Schubert, Franz Peter. Who Is Sylvia: Song. New York: Music Sales, 1999.
Cita MLA (9th ed.)Schubert, Franz Peter. Who Is Sylvia: Song. Music Sales, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.