Adding <script> tag in head

I am looking to add ](src="https://maps.googleapis.com/maps/api/js?v=3.exp&libraries=places&key=abcd2234">

And)
[And](src=“https://maps.googleapis.com/maps/api/js?v=3.exp&libraries=places&key=abcd2234”>
And) then using module google in my public/*.js file. But neither head is set as above nor I: can use module google. Whats going on?