APA (7th ed.) Citation

Whistler, H. S., & Hummel, H. A. (1954). Selected duets for violin. Hal Leonard.

Chicago Style (17th ed.) Citation

Whistler, Harvey S., and Herman A. Hummel. Selected Duets for Violin. Milwaukee, WI: Hal Leonard, 1954.

MLA (9th ed.) Citation

Whistler, Harvey S., and Herman A. Hummel. Selected Duets for Violin. Hal Leonard, 1954.