APA Citation

Wagner, R., & Kühn, E. E. F. Richard Wagners Musikdramen. Berlin.

Chicago Style Citation

Wagner, Richard, and Edmund E. F. Kühn. Richard Wagners Musikdramen. Berlin.

MLA Citation

Wagner, Richard, and Edmund E. F. Kühn. Richard Wagners Musikdramen. Berlin.

Warning: These citations may not always be 100% accurate.