Ferrtt Sharon K. (2005). Peak Performance: Success in College and Beyond with online access card. American: Career Education.
Chicago-tyylinen lähdeviittausFerrtt Sharon K. Peak Performance: Success in College and Beyond With Online Access Card. American: Career Education, 2005.
MLA-viiteFerrtt Sharon K. Peak Performance: Success in College and Beyond With Online Access Card. American: Career Education, 2005.
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