APA (7th ed.) Citation

WHISTLER, H. S., & HUMMEL, H. A. (1954). String companions duet collection (for violin and viola duet). Rubank Inc.

Chicago Style (17th ed.) Citation

WHISTLER, Harvey S., and Herman A. HUMMEL. String Companions Duet Collection (for Violin and Viola Duet). Rubank Inc, 1954.

MLA (8th ed.) Citation

WHISTLER, Harvey S., and Herman A. HUMMEL. String Companions Duet Collection (for Violin and Viola Duet). Rubank Inc, 1954.

Warning: These citations may not always be 100% accurate.