| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1985 | 978-0-932541-00-0 | Alison L. Grinder · E. Sue McCoy | The Good Guide: A Sourcebook for Interpreters, Docents, and Tour Guides |
| 1986 | 978-0-932541-01-7 | Robert E. Grinder · George H. Fathauer | Radio Collector's Directory and Price Guide |