Oriģināls: The Clippinger Class-Method of Voice Culture. Edited by Frank Damrosch, W.A.F., Granville Bantock, Heinrich Kiehl, Ebenezer Prout.
Tulkojums: Clippinger klases metode balss Kultūras. Edited by Frank Damrosch, WAF, Granville Bantock, Henrijs Kiehl, Ebenezer PROUT. Klasisks.