Wagner, R. (1992). Passifal: Stage dedication festival play in three acts. Philips Classics Productions.
Cita Chicago (17th ed.)Wagner, Richard. Passifal: Stage Dedication Festival Play in Three Acts. [S.l.]: Philips Classics Productions, 1992.
Cita MLA (9th ed.)Wagner, Richard. Passifal: Stage Dedication Festival Play in Three Acts. Philips Classics Productions, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.