<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="container">
<div class="row">
<legend>
Personal Info</legend>
<div class="clearfix">
<div class="form-group col-sm-3 col-xs-12">
<label for="name">Name</label>
<input value="" id="name" type="text" size="50" maxlength="29" name="name" class="required form-control">
</div>
<div class="form-group col-sm-3 col-xs-12">
<label for="surname">Surname</label>
<input value="" id="surname" type="text" size="50" maxlength="29" name="surname" class="required form-control">
</div>
<div class="form-group col-sm-3 col-xs-12">
<label for="email">E-Mail</label>
<input value="" id="email" type="email" size="50" maxlength="50" name="email" class="required email form-control">
</div>
<div class="form-group col-sm-3 col-xs-12">
<label for="gsm">GSM</label>
<input value="" id="gsm" type="number" size="50" maxlength="40" name="gsm" class="required form-control">