- eBookCaruso and Tetrazzini on the Art of SingingLuisa Tetrazzini
- eBookHow to Become a Successful SingerEnrico Caruso
- eBookHow to Become a Successful SingerEnrico Caruso
- eBookCaruso and Tetrazzini On the Art of SingingEnrico Caruso
- eBookCaruso and Tetrazzini on the Art of SingingLuisa Tetrazzini
- eBookCaruso and Tetrazzini on the Art of SingingEnrico Caruso