<meta http-equiv=content-type content=text/html; charset=latin5_turkish_ci>
<meta http-equiv=content-type content=text/html;charset=iso-8859-9>
<meta http-equiv=content-type content=text/html;charset=windows-1254>
<meta http-equiv=content-type content=text/html;charset=x-mac-turkish>

bunlardan herhangi birini kullanabilirsin fakat charset=latin5_turkish_ci kullanmak mantıklı olabilir.