Stephen Pierog scored both goals for the Petes (21-31-7).
Peterborough opened the scoring when Pierog was left alone in front of the Belleville net at 12:03 of the second period.
The Bulls answered back on the power play, starting with Graovac while Belleville was on a 5-on-3 advantage. Still up a man, Zharkov but the Bulls ahead in the final minute of the period.
Belleville carried the momentum in to the third period with Graovac and Zharkov both scoring again.
Pierog answered for the Petes to cut the lead to two, however Cramarossa added another power-play goal for the Bulls.
Belleville went 3 for 5 with the man advantage while Peterborough failed to score on two power-play chances.