APA (7th ed.) Citation

Moussorgsky, M., Purdy, C., & Gaillard, R. (1917). Hopak. Oliver Ditson.

Chicago Style (17th ed.) Citation

Moussorgsky, Modest, Constance Purdy, and Rodolphe Gaillard. Hopak. Boston: Oliver Ditson, 1917.

MLA (9th ed.) Citation

Moussorgsky, Modest, et al. Hopak. Oliver Ditson, 1917.