<link href="//netdna.bootstrapcdn.com/bootstrap/3.1.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.1.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<form class="form-horizontal">
<fieldset>
<legend>Marka Bilgisi</legend>
<div class="form-group">
<label class="col-md-4 control-label" for="selectbasic">Ürün Markası</label>
<div class="col-md-4">
<select id="selectbasic" name="selectbasic" class="form-control">
<option value="1">Marka1</option>
<option value="2">Marka2</option>
</select>
</div>
</div>
<div class="form-group">
<label class="col-md-4 control-label" for="singlebutton"></label>
<div class="col-md-4">
<button id="singlebutton" name="singlebutton" class="btn btn-primary">Kaydet</button>
</div>
</div>
</fieldset>
</form>