| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Laboratory Manual to Accompany En Directo!: A Beginning Course | 978-0-07-006973-2 (0-07-006973-5) | 1994 | Martha E. Schaffer · Dorothy A Rissel · John A Left · Maria Morris |
| Workbook to Accompany En Directo! A Beginning Course, 2nd Edition | 978-0-07-006972-5 (0-07-006972-7) | 1994 | Lee Ann Grace · Dorothy A Rissel · John A Left · Martha E Schaffer · Mayra Portillo Zeleny |