| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Diction for Singers: A Concise Reference for English, Italian, Latin, German, Fr | 978-1-934477-O5-2 (1-934477-O5-2) | 2005 |
C. G. · C. T. · R. C. · R. T. · Robert C. · Robert Caldwell · Robert G. · Robert T. · Robert Tracy · Tracy G