Tan, Haidee Lynn C. Register Unification in Light of Twentieth-Century Vocal Pedagogy. Denton, Texas. UNT Digital Library. http://digital.library.unt.edu/ark:/67531/metadc5527/. Accessed December 29, 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.