| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2008 | 978-0-9678303-0-8 | Forrest L. Farmer | Building Service Contracting: How to Start, Promote, and Manage a Cleaning Maintenance Janitorial Service Business, (Softbound Edition) |
| 2000 | 978-0-9678303-2-2 | '' | Sales and Marketing for Janitorial Service Businesses: Strategies for Promoting, Estimating, and Bidding Cleaning Services |
| '' | 978-0-9678303-3-9 | '' | The Science of Professional Cleaning: Handbook for Janitorial Services |