H.A. · Howard Astin · Howard Austin Schulsinger
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| ABCs of Vocal Harmony, Singing Lessons, Sight-Singing, Ear-Training, Singing Harmony | 978-0-934419-35-2 | 1999 | Elisabeth Howard |
| Born to Sing | 978-0-934419-00-0 | 1976 | " |
| Born to Sing, Beginners to Advanced High and Low Voice | 978-0-934419-34-5 | 1985 | |
| Sing! Book, 4 CD's & DVD | 978-0-934419-19-2 | 2006 | Elisabeth Howard |