Here is a list of trusted sources, and links to their websites.
- Society of Manufacturing Engineers
- Dayton Tooling & Manufacturing Association
- Automotive Aftermarket Suppliers Association
- Automotive Aftermarket Industry Association
- Yasotay
- Global Source Manufacturing
- National Tooling & Machining Association
- Precision Metalforming Association
- American Society for Quality
- OSHA
- American Purchasing Society
- Association of Home Appliance Manufacturers
- Builders Hardware Manufacturers Association