Lopez-Barrantes, R., Leneghan, G., & Lopez-Barrantes, A. (2024). Voice made visible: Multi-octave voice training and techniques for performers. Routledge.
Chicago-viite (17. p.)Lopez-Barrantes, Rafael, Grace Leneghan, ja Aaron Lopez-Barrantes. Voice Made Visible: Multi-octave Voice Training and Techniques for Performers. New York: Routledge, 2024.
MLA-viite (9. p.)Lopez-Barrantes, Rafael, et al. Voice Made Visible: Multi-octave Voice Training and Techniques for Performers. Routledge, 2024.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.