Originalus: Thirty Exercises for the Voice, Op. 11. C4-A5. Thirty Exercises for the Voice, Op. 11. - Digital Sheet Music. Piano.
Vertimas: Trisdešimt Pratimai balso, op. 11. Pratimai 21 sudaro Joseph Concone. - Skaitmeniniai lapas muzika. Planas. Vokalas. Balso, asortimentas.