APA (7th ed.) Citation

Wagner, R., Liszt, F., & Williams, L. (2014). Wagner without words. Signum Classics.

Chicago Style (17th ed.) Citation

Wagner, Richard, Franz Liszt, and Llŷr Williams. Wagner Without Words. Perivale: Signum Classics, 2014.

MLA (9th ed.) Citation

Wagner, Richard, et al. Wagner Without Words. Signum Classics, 2014.