external style sheet definition code example
Example 1: external css
<html>
<head>
<link rel="stylesheet" type="text/css" href="mystyle.css"></link>
</head>
<body>
Example 2: how to refer to external style sheet
<html>
<head>
<link rel="stylesheet" type="text/css" href="Name.css">
</head>
<body>
.
.
.
</body>