I was taught this way, too. I mean, when i was reading a lot of case law for paralegal school, the period was inside the marks. Like this: As you can see, there are 4 dots inside the quotes. So it's inside the mark, not outside. The only exception I think I remember is when it's citing something like this: If that's not corrent, then I don't know WHAT I did for 2 years of paper. EEK.