- Is the publication date clearly stated?
- Is the site current?
- Are any links up-to-date and working?
Even when a date is provided, it may have various meanings. It may indicate:
- when the material was first written
- when the material was first placed on the web
- when the material was last revised
Try to determine the currency of the information based on what the site provides for you, and if it provides nothing, maybe that should factor into your determination of the site's value to your work.