If you're putting a whole sentence in parentheses, the custom follows logic -- put the period inside the parentheses, not outside it. Thus, for an example from a court case (in a state, California, ...

People sometimes tell me to tell other people what to do, linguistically that is. I’ll get an email saying something like, “It drives me nuts when people say ‘Fruit is a healthy snack’ instead of ...

Writing coach and CUNY Journalism Press editor Timothy Harper tells us how to properly use ellipses, em dashes, and parentheses. FULL TRANSCRIPT: The default, typically, when we’re using punctuation ...