Cita APA (7a ed.)

Wagner, R., & Sabor, R. (1997). Siegfried. Phaidon Press.

Cita Chicago Style (17a ed.)

Wagner, Richard, y Rudolph Sabor. Siegfried. London: Phaidon Press, 1997.

Cita MLA (9a ed.)

Wagner, Richard, y Rudolph Sabor. Siegfried. Phaidon Press, 1997.