How do you get microsoft 2013 on a macbook?

I just got a macbook pro 13" with retina display and for my CSCI 190 class I need Microsoft 2013 to complete assignments, how should I get microsoft 2013 on my macbook?
Asked Sep 18, 2013

TIP: If it's not your answer to this question, please click "Leave a Comment" button under the question to communicate with the question owner.