1) http://grammar.ccc.commnet.edu/GRAMMAR/quizzes/quotes_quiz.htm
2) http://www.oswego.org/ocsd-web/quiz/mquiz.asp?filename=tandersoquotes
3) http://www.quia.com/jq/86640.html
4) http://www.grammarbook.com/grammar_quiz/question_marks_1.asp
5) http://www.softschools.com/quizzes/grammar/quotation_marks/quiz1632.html
6) http://www.quia.com/quiz/1255538.html