| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 978-0-9717477-2-2 | Walter Fenix | Cleaning Services Bid Estimation | |
| 2002 | 978-0-9717477-4-6 | '' | Commerical & Residential Cleaning Services: A Resource Guide To Developing And Maintaining Your Own Janitorial Or Home Cleaning Business |
| '' | 978-0-9717477-6-0 | '' | Cleaning Services Bid Estimation |
| '' | 978-0-9717477-7-7 | '' | Commercial and Residential Cleaning Services |