<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<form class="form-horizontal">
<fieldset>
<legend>Form Name</legend>
<div class="form-group">
<label class="col-md-4 control-label" for="textinput">Nome</label>
<div class="col-md-5">
<input id="textinput" name="textinput" placeholder="" class="form-control input-md" type="text">
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label" for="textinput">E-mail</label>
<div class="col-md-4">
<input id="textinput" name="textinput" placeholder="" class="form-control input-md" type="text">
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label" for="textinput">Assunto</label>
<div class="col-md-4">
<input id="textinput" name="textinput" placeholder="" class="form-control input-md" type="text">
</div>
</div>