coding for social icons

Hi there, i am looking to work out the right code to add custom social icons to the footer of my site: http://www.absolutepartycruises.com – the images are currently missing and i am unsure where and what to add into the code…

Currently the code is;

<ul class=”social social__list unstyled”>
<li class=”social_li”>

<span class=”social_ico”>
<img alt=”” src=” http://absolutepartycruises.com/wp-content/uploads/2015/02/mail.png”&gt;
</span>
<span class=”social_label”>google+</span>

<li class=”social_li”>

<span class=”social_ico”>
</span>
<span class=”social_label”>+44 208 306 5333 </span>

<li class=”social_li”>

<li class=”social_li”>

<span class=”social_ico”>
<img alt=”” src=” http://absolutepartycruises.com/wp-content/uploads/2015/02/cell.png
“>
</span>
<span class=”social_label”>Email US</span>

Where am I going wrong?!