I have noticed recently in books a disparity with regards to punctuation marks around quotes. In one example I saw a punctuation mark (in this case a full stop) was placed inside the closing quotation mark. However, I am more accustomed to seeing the punctuation mark outside the closing quotation mark.
For example: Mark said 'I go there all the time'. or 'I go there all the time.'
Which is correct? Or would both be considered to be fine?