Tutorials,Line Art and Tube's I have used to Make Graphics are from: 
These wonderful Sites and Groups
Memberships New and Old
Licenses and Credits
 

  I have learned so much from These Memberships I Can not even begin to thank them all enough for all the hard work they do for the Graphics Community :) 

Current Memberships and Licenses
Special License's
Groups and Forums I Belong To
Expired or Closed Site Memberships