ontrol-label" for="book_format_to">{{_('Convert to:')}}</label>
                  <select class="form-control" name="book_format_to" id="book_format_to">
                    <option disabled selected value>-- {{_('select an option')}} --</option>
                    {% for format in conversion_formats %}
                    <option>{{format|upper}}</option>
                    {% endfor %}
                  </select>
              </div>
          </div>
          <button type="submit" class="btn btn-primar