<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
#point:after{
content:"\00027";
}
</style>
</head>
<body>
<p>Apostrophe using Hexa Decimal: '</p>
<p>Apostrophe using HTML Code: '</p>
<p>Apostrophe using HTML Entity: '</p>
<p id="point">Apostrophe using CSS Entity: </p>
</body>
</html>