Original: The Clippinger Class-Method of Voice Culture. Edited by Frank Damrosch, W.A.F., Granville Bantock, Heinrich Kiehl, Ebenezer Prout.
Oversettelse: Den Clippinger Class-Måte Voice Kultur. Redigert av Frank Damrosch, WAF, Granville Bantock, Henry Kiehl, Ebenezer Prout. Tale noter.