G. A. ยท Guido Apel
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Hola! Communicating with Spanish-Speaking Parents | 978-1-56417-898-5 (1-56417-898-6) | 2001 |
| Our Living Constitution, Grades 5 to 8 | 978-0-7682-2456-6 (0-7682-2456-X) | 2002 |
| Summer Skills 2nd Grade Grad | 978-0-7682-0040-9 (0-7682-0040-7) | 2000 |