S. Rothenberg Paula. (2010). What's the Problem?: A Brief Guide to Thinking Critically. New York: Catherine Woods.
Chicago-tyylinen lähdeviittausS. Rothenberg Paula. What's the Problem?: A Brief Guide to Thinking Critically. New York: Catherine Woods, 2010.
MLA-viiteS. Rothenberg Paula. What's the Problem?: A Brief Guide to Thinking Critically. New York: Catherine Woods, 2010.
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