APA (7th ed.) Citation

Walter, B., Boulez, P., & Liébert, G. (1983). Gustav Mahler. Alianza.

Chicago Style (17th ed.) Citation

Walter, Bruno, Pierre Boulez, and Georges Liébert. Gustav Mahler. Madrid: Alianza, 1983.

MLA (9th ed.) Citation

Walter, Bruno, et al. Gustav Mahler. Alianza, 1983.