Let's face it. When you are writing an important report or even email, the Grammar Guru may not be available to answer your questions. For instance, you may be puzzling over whether or not quotation marks go before or after the period at the end of a sentence. If there is no teacher (or grammar book around), go to "Purdue OWL on your computer. There you will find answers to almost every grammar or writing style quandary. Of course, it's not as good ask asking the Grammar Guru your specific questions because you will have to "search" for the specific question and answer. But Purdue OWL offers you perfect back-up in emergency grammar situations!
THE ANSWER TO THE ABOVE QUESTION: In American written English, the period, question mark or exclamation mark goes inside the quote marks. It's the opposite with British English.
When speaking, we can pause or change the tone of our voices to indicate emphasis. When writing, we use punctuation to indicate these places of emphases. This handout should help to clarify when and how to use
via Purdue OWL: Punctuation."