And...

It's been my experience in school thus far (as a super-senior) that you will generally use MLA for Arts fields and APA for science. I have used MLA my entire college career (which seems to never end) and have never used APA. My soon-to-be wife has a BSN and has used APA her entire college career...just to throw out a couple examples.

It is probably good to know both, however, if your professor lets you pick a style then choose what's going to be best for your college career path

IMHO