| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| A Practical Guide to Behavioral Research: Tools and Techniques | 978-0-19-514209-9 (0-19-514209-8) | 2001 | Robert Sommer |
| La investigación del comportamiento. | 978-970-613-595-7 (970-613-595-2) | 2001 | " |
B. S. · B. Sommer · Barbara Baker Sommer · Barbara W. Sommer · Barbara W. Sommer Mary Kay Quinlan