Autor: Richard waters, 7 titluri

Lonely Planet,Alexis Averbuck,Kate Armstrong,Korina Miller,Richard Waters

Volume 2: Soprano Book Only,Paperback,Richard Walters

Volume 6: Mezzo Soprano/belter Book/online Audio,Paperback,Richard Walters

Volume 2: Baritone/bass Book With Online Audio 'with 2 Cds',Paperback,Richard Walters