<form class="col-md-12">
<div class="row text-center">
<div class="col-md-4 col-sm-12">
<button type="button" class="btn btn-primary btn-block">Facebook</button>
</div>
<div class="col-md-4 col-sm-12">
<button type="button" class="btn btn-info btn-block">Twitter</button>
</div>
<div class="col-md-4 col-sm-12">
<button type="button" class="btn btn-danger btn-block">Google+</button>
</div>
</div>
<hr />
<div class="form-group">
<input type="text" class="form-control input-lg" placeholder="Email">
</div>
<div class="form-group">
<input type="password" class="form-control input-lg" placeholder="Password">
</div>
<div class="form-group">
<input type="password" class="form-control input-lg" placeholder="Confirm Password">
</div>
<div class="form-group">
<button class="btn btn-primary btn-lg btn-block">Sign In</button>
</div>
</form>