APA (7th ed.) Citation

Beethoven, L. V., Mariassy, I., & Zaszkaliczky, T. (1994). Sonaten II. Konemann Music Budapest.

Chicago Style (17th ed.) Citation

Beethoven, Ludwig Van, Istvan Mariassy, and Tamas Zaszkaliczky. Sonaten II. Konemann Music Budapest, 1994.

MLA (8th ed.) Citation

Beethoven, Ludwig Van, et al. Sonaten II. Konemann Music Budapest, 1994.