As an MN resident who worked in ND, I received two W2s that split the income by state - do I file for both under one employer or do I file separate W2s?

During college I worked in North Dakota as a Minnesota resident. I received two W2s from my employer - one for MN and one for ND. The MN W2 has both federal and state tax information while the ND W2 only includes state tax information. 

Adding box 16 from each W2 equals the total amount I made from the job (Box 1 of the MN W2). Am I supposed to add another row for boxes 15-20 for the ND W2 under that employer or am I supposed to file it as another W2?