APA (7th ed.) Citation

Wagner, R., & Jackson, J. P. (1890). Parsifal, a festival music-drama ... [publisher not identified].

Chicago Style (17th ed.) Citation

Wagner, Richard, and John P. Jackson. Parsifal, a Festival Music-drama ... New York: [publisher not identified], 1890.

MLA (9th ed.) Citation

Wagner, Richard, and John P. Jackson. Parsifal, a Festival Music-drama ... [publisher not identified], 1890.