Custom footer impossible

Hello I put this on single.php on my theme child but i can’t see my logo on the footer. What am I doing wrong?

<?php the_content(); ?><p class=”print-footer” style=”display:none”>
<img src=”/www/wp-content/plugins/printfriendly/images/mylogo.png”>This is my tagline
</p>

</section> <!– end article section –>

Is it the adress of my image?

Thanks a lot for your answer. I tried also by css custom and can’t see my logo on my footer.

https://wordpress.org/plugins/printfriendly/