You might need to copy/paste these lines into the <head></head>
section of your HTML document:
<script src="https://code.jquery.com/jquery-1.11.0.min.js"></script>
<link rel="stylesheet" href="https://netdna.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css">
<link rel="stylesheet" href="https://netdna.bootstrapcdn.com/font-awesome/3.2.1/css/font-awesome.min.css">
Found (via DevTools) in the <head></head>
section of the page you referenced.
solved How to properly copy html/css snippet