APA (7th ed.) Citation

Mozart, W. A., Haydn, J., Zamborský, S., & Warchal, B. (1990). Piano concertos. Opus.

Chicago Style (17th ed.) Citation

Mozart, Wolfgang Amadeus, Joseph Haydn, Stanislav Zamborský, and Bohdan Warchal. Piano Concertos. Bratislava: Opus, 1990.

MLA (9th ed.) Citation

Mozart, Wolfgang Amadeus, et al. Piano Concertos. Opus, 1990.