Centering Image in footer text widget

Hi,

I’m trying to center an image (inside a div) but its not working.

Here’s the html I have in the text widget:

<div style=”text-align: center;” class=”item post-35 post type-post status-publish format-standard has-post-thumbnail hentry”><img src=”https://toxicescape.com/wp-content/uploads/2015/08/Amazon-button1-300×197.gif&#8221; alt=”Amazon button” width=”300″ height=”197″ size-medium wp-image-442″ /></div>

Any idea’s how I can get this to center?

Thanks
Karl