[digital vocal score] Parsifal

MLA

Wagner, Richard, and Felix Mottl. [digital Vocal Score] Parsifal. Leipzig: Peters, 1914.

APA

Wagner, R., & Mottl, F. (1914). [digital vocal score] Parsifal. Leipzig: Peters.

Chicago

Wagner, Richard, and Felix Mottl. [digital Vocal Score] Parsifal. Leipzig: Peters, 1914.