Trigger GA event on click

Hello,

I try to trigger an GA event when a button is clicked.

Is used that script :

<script>
jQuery(document).ready(function() {
jQuery(‘.ga-track’).on(‘click’, function(e) {
ga(‘send’, ‘event’, ‘Boton’, ‘Clic’, ‘Prueba’, ‘0’ );
});
});
</script>

My button got the class “ga-track”

But when i click it i have that error :
“Uncaught ReferenceError: ga is not defined”

Any idea on how i can fix that ?

Thank you ??