Reliable - "suitable or fit to be relied on"
Reputable - "enjoying good repute"
Resource - "a source of information or expertise"
All definitions courtesy of Merriam-Webster's Online Dictionary.
http://www.merriam-webster.com/dictionary/reliable
http://www.merriam-webster.com/dictionary/reputable
http://www.merriam-webster.com/dictionary/resource
