external css

CSS
<link rel="stylesheet" type="text/css" href="mystyle.css"><html>
  <head>
    <link rel="stylesheet" type="text/css" href="mystyle.css"></link>
  </head>

  <body><link rel="stylesheet" type="text/css" href="style.css">  <!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" type="text/css" 
  href="mystyle.css">
</head>
<body>

<h1>This is a heading</h1>

  <p>This is a paragraph.</p>

</body>
</html> /* Answer to: "link to css" */
<head>
  <link rel="stylesheet" type="text/css" href="yourcss.css">
</head> <link rel="stylesheet" type="text/css" href="mystyle.css">
Source

Also in CSS: