APA (7th ed.) Citation

Wyschnegradsky, I., Ives, C., Schleiermacher, S., & Christof, J. Quarter-tone pieces.

Chicago Style (17th ed.) Citation

Wyschnegradsky, Ivan, Charles Ives, Steffen Schleiermacher, and Josef Christof. Quarter-tone Pieces.

MLA (9th ed.) Citation

Wyschnegradsky, Ivan, et al. Quarter-tone Pieces.