APA (7th ed.) Citation

WHISTLER, H. S., & HUMMEL, H. A. (1987). Pre-ensemble folio for strings from solo and unison playing to string ensemble performance. Rubank Inc.

Chicago Style (17th ed.) Citation

WHISTLER, Harvey S., and Herman A. HUMMEL. Pre-ensemble Folio for Strings from Solo and Unison Playing to String Ensemble Performance. Rubank Inc, 1987.

MLA (8th ed.) Citation

WHISTLER, Harvey S., and Herman A. HUMMEL. Pre-ensemble Folio for Strings from Solo and Unison Playing to String Ensemble Performance. Rubank Inc, 1987.

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