You can add a Zotero button to your blog or website by copying the HTML below the button you like and pasting it onto your page.

<a href="http://www.zotero.org/"> 
<img border="0" alt="Get Zotero" title="Get Zotero" 
src="http://www.zotero.org/images/promote/get_zotero_80x15.gif"> 
</a> 

<a href="http://www.zotero.org/">
<img border="0" alt="Get Zotero" title="Get Zotero" 
src="http://www.zotero.org/images/promote/get_zotero_98x39.gif">
</a> 

<a href="http://www.zotero.org/">
<img border="0" alt="Get Zotero" title="Get Zotero"
src="http://www.zotero.org/images/promote/get_zotero_150x72.jpg">
</a>