<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
#point:after{
content:"\00308";
}
</style>
</head>
<body>
<p>Diaeresis using Hexa Decimal: ̈</p>
<p>Diaeresis using HTML Code: ̈</p>
<p id="point">Diaeresis using CSS Entity: </p> </body>
</html>