Feuchtinger, E. (1928). The truth about voice: Explaining a new discovery in physical voice culture (5. ed., completely rewritten, enlarged.). Perfect Voice Institute.
Chicago-Zitierstil (17. Ausg.)Feuchtinger, Eugen. The Truth About Voice: Explaining a New Discovery in Physical Voice Culture. 5. ed., completely rewritten, enlarged. Chicago, Ill: Perfect Voice Institute, 1928.
MLA-Zitierstil (9. Ausg.)Feuchtinger, Eugen. The Truth About Voice: Explaining a New Discovery in Physical Voice Culture. 5. ed., completely rewritten, enlarged. Perfect Voice Institute, 1928.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.