- Better Homes & Gardenswww.bhg.com
- Mother Earth News – Tree Planting Tips and Stapswww.motherearthnews.com
- CLEANSMART – Making Cleaning More Sustainablewww.ukcpi.org
- CLEANSMART – Cleaning Safelywww.ukcpi.org
- Cleaning Institute – Sustainable Cleaningwww.cleaninginstitute.org
