Wagner, R., & Bohm, K. Das Rheingold. s.n.
Cita Chicago (17th ed.)Wagner, Richard, i Karl Bohm. Das Rheingold. [S.l: s.n.
Cita MLA (9th ed.)Wagner, Richard, i Karl Bohm. Das Rheingold. s.n.
Atenció: Aquestes cites poden no estar 100% correctes.
Wagner, R., & Bohm, K. Das Rheingold. s.n.
Cita Chicago (17th ed.)Wagner, Richard, i Karl Bohm. Das Rheingold. [S.l: s.n.
Cita MLA (9th ed.)Wagner, Richard, i Karl Bohm. Das Rheingold. s.n.