| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 1999 | 978-0-9601054-0-3 | Mary Pat Johnson | Everything You Need to Know to Start A House Cleaning Service |
| 1978 | 978-0-9601054-1-0 | Cleaning Consultant Serv. | Comprehensive Carpet & Rug Cleaning: Comprehensive Custodial Training Manual, Chapters 1,2,4 |
| 1998 | 978-0-9601054-4-1 | William R. Griffin ยท Bruce Jackson | Food Service: Health, Sanitation, and Safety |