You are the exclusive owner of the hub articles. Rather you can put a notice in your profile as under :
© Copyright 2013 All rights reserved and further you can write not to copy and paste any content from your hubs. However you can ask your followers/readers/visitors to provide URL link of your hub pages any where on the web. Providing link will be justified. You can type copyright symbol ( Ctl + Alt and press C ) in a separate word document and paste on your profile .
You own full rights what you publish till it is your original work.