LEBORGNE, Wendy DeLeo - ROSENBERG, Marci Daniels. The vocal athlete. Second edition. San Diego, CA : Plural Publishing, [2021]. ©2021. 1 online zdroj (xx, 393 stran). Available on Internet: <https://ebookcentral.proquest.com/lib/ujep-ebooks/detail.action?docID=5839408> ISBN 978-1-63550-165-0.