Punctuation (University of Toronto) - http://advice.writing.utoronto.ca/revising/punctuation/"Many students do not take full advantage of punctuation. They never venture beyond the comma and the period—the two punctuation marks that nobody can do without. Some are afraid that if they use other forms of punctuation, they will do so incorrectly, so they never take the risk. Learning to punctuate effectively does involve learning the rules, and this handout summarizes the most important of them. . .This handout limits itself to punctuation that occurs within sentences: commas, semicolons, colons, dashes, and parentheses." -- website