Code to add signup button to your site:
<a href="https://YOURLINKHERE"> <img src="https://selfpublishingteam.com/wp-content/uploads/2013/02/IMAGENAME.gif"> </a>
An example:
<a href="https://eepurl.com/1234"> <img src="https://selfpublishingteam.com/wp-content/uploads/2013/02/emailbutton-red.gif"> </a>
Facebook Buttons