Intentional foul?

[mGONZ]

I just started refereeing last year. Nothing serious, just intramural games at my former playground and grammar school. I was just wondering if I got this call right in a 12 and 13 year old girls game. Team A had inbounded the ball at the PG was dribbling down the sideline and was being guarded by the PG from team B. I was trailing the play and on the sideline. Another defensive player came at an angle from behind the player handling the ball and extended both of her hands and shoved her in the small of the back. Was I correct to call an intentional foul in this situation? Im new here so thanks for the help!!