My MktoForm is loaded more than once each time.

How can my Marketo form be loaded only once?

it displays three of the forms.

the form's php file called from certain WP pages with shortcode.

<div id="form_mkt">

    <script src="//app-ab00.marketo.com/js/forms0/js/forms0.min.js"></script>

    <form id="mktoForm_0000"></form>

    <script>

    var myReferrer;

  myReferrer = document.title;

  MktoForms0.loadForm("//app-ab00.marketo.com", "000-MDO-000", 0000 ,function(form) {

     form.vals({"LPPageTitle" : myReferrer});}

);  </script>

</div>