APA (7th ed.) Citation

Kern, J., & Kálmán, E. (1916). My castle in the air. T.B. Harms.

Chicago Style (17th ed.) Citation

Kern, Jerome, and Emmerich Kálmán. My Castle in the Air. New York: T.B. Harms, 1916.

MLA (9th ed.) Citation

Kern, Jerome, and Emmerich Kálmán. My Castle in the Air. T.B. Harms, 1916.