APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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