Here is a simple example sentence byFreelance Writing Gigs:
I had a sleepless night thanks to Susan Cain’s “Quiet”
Question: Where do you put the period? Inside or outside of the quotation marks?
I thought I knew. Guess what: It seems I was wrong.
Part of the answer seems to be: It depends where you live.
(Talking about being confused, being a German who learned British English at school but who is currently targeting the American writing market!)
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(Hint: The above version seems to comply with the American Way of punctuation.)