APA (7th ed.) Citation

Whistler, H. S., & Hummel, H. A. (1957). Pre-ensemble folio for strings: From solo and unison playing to string ensemble performance. Rubank.

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. Chicago: Rubank, 1957.

MLA (9th ed.) Citation

Whistler, Harvey S., and Herman A. Hummel. Pre-ensemble Folio for Strings: From Solo and Unison Playing to String Ensemble Performance. Rubank, 1957.