Originál: The Clippinger Class-Method of Voice Culture. Edited by Frank Damrosch, W.A.F., Granville Bantock, Heinrich Kiehl, Ebenezer Prout.
Preklad: Clippinger triedy Spôsob Voice kultúry. Editoval Frank Damrosch, WAF, Granville Bantock, Henry Kiehl, Ebenezer Prout. Hlas noty.