The URL information, as additional discription of a tag, is specified in attributes of tag:
The code is listed here:
<html>
<head>
<title>Sample Page</title>
</head>
<body>
<p>Something I use everyday: <img src="http://www.google.com/logos/olympics06_luge_res.gif"> <
a href="http://www.google.com">Google</a>. I like it.</p>
<center><img src="http://www.google.com/logos/olympics06_luge_res.gif"></center>
</body>
</html>
Result:
Something I use everyday: 
Google. I like it.