APA (7th ed.) Citation

Hummel, J. N., Marcinger, Ľ., Kováč, P., Csiba, P., & Johann Nepomuk Hummel. (1998). Piano compositions. Opus.

Chicago Style (17th ed.) Citation

Hummel, Johann Nepomuk, Ľudovít Marcinger, Pavol Kováč, Peter Csiba, and Johann Nepomuk Hummel. Piano Compositions. Bratislava: Opus, 1998.

MLA (9th ed.) Citation

Hummel, Johann Nepomuk, et al. Piano Compositions. Opus, 1998.