Siegfried

MLA

Wagner, Richard, et al. Siegfried. Waldron, Heathfield, East Sussex : Opus Arte, [2005]

APA

Wagner, R., Treleaven, J., Clark, G., Struckmann, F., Kannen, G., Halfvarson, E., Bönig, A., Polaski, D., Obregón, C., Billy, B., Kupfer, H., Schavernoch, H., Heinrich, R., Voss, M., Bargalló, T., Gran Teatre del Liceu (Barcelona, S. & Opus Arte (Firm). (2005). Siegfried. Waldron, Heathfield, East Sussex : Opus Arte.

Chicago

Wagner, Richard, John Treleaven, Graham Clark, Falk Struckmann, Günter von Kannen, Eric Halfvarson and Andrea Bönig, et al. Siegfried. Waldron, Heathfield, East Sussex : Opus Arte, [2005]