I actually haven't taken a quiz for it. I came to this conclusion based on some wiki reading and the analysis of a friend, who is very into this system. (She is an INTJ as well, but she is Choleric Melancholic)
I know you can take the test here but I can't tell you how accurate it is.
Also many of these sites/tests come with a Christian/Catholic bias, so you will have to wade through that at your own discretion.

















