Choosing 3rd LOR

[bostoff]

Hi! I'm currently applying to MA/PhD programs in Art History with a focus on modern and contemporary Latin-American art. I have two very solid letters of rec from two professors with whom I've worked closely with (TA positon, study abroad, etc). However, I'm at a loss as to who to choose for my third. I could either ask my former boss at a museum internship (I worked closely with them; they also hold a PhD in art history and was also a Latin-Americanist when they were involved in academia) or another of the professors in my department (who is a Latin-Americanist and with whom I've taken several classes; unfortunately they are only a lecturer -- non-tenure track). I'm not sure which of these two would be a better pick. Any advice is appreciated!