Petrella, Diane Helfers. The Tone Clock: Peter Schat's System and an Application to His Etudes for Piano and Orchestra, Opus 39. Denton, Texas. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc5517/. Accessed July 24, 2014.
Note: Inconsistencies in capitalization and punctuation within the Digital Library may affect this citation. Before using this citation in formal writing, please consult your preferred style manual. More information.