| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1977 | 978-0-9602296-0-4 | William D. Leyerle | Vocal Development Through Organic Imagery |
| 1986 | 978-0-9602296-7-3 | John G. Paton | L'Aria Barocca: Medium Low Voice |
| 1990 | 978-0-9602296-9-7 | Anne L. Leyerle | French Diction Songs |