1. Echo Song Collection: Music and Performing Arts Library: Choral Reference (MUXCAT_CHO) Contributers: Lasso, Orlando di (composer) and Grayson, C. (arranger) Format: Vocal Score Publication Date: unknown Location: Music and Performing Arts Library, University of Illinois at Urbana-Champaign
2. Echo song Collection: Music and Performing Arts Library: Choral Reference (MUXCAT_CHO) Contributers: Lasso, Orlando di (composer) Format: Vocal Score Publication Date: unknown Location: Music and Performing Arts Library, University of Illinois at Urbana-Champaign
3. Ola! O che buon eco! SATB (double-chorus) Collection: Music and Performing Arts Library: Choral Reference (MUXCAT_CHO) Contributers: Lasso, Orlando di (composer) and Andersen, arthur Olaf, Echo Song (arranger) Format: Vocal Score Publication Date: unknown Location: Music and Performing Arts Library, University of Illinois at Urbana-Champaign