It's easy to cite LitCharts for use in academic papers and reports.
MLA
Lucas, Julian. "Candide." LitCharts. LitCharts LLC, 16 Sep 2013. Web. 15 Feb 2019.
Chicago
Lucas, Julian. "Candide." LitCharts LLC, September 16, 2013. Retrieved February 15, 2019. https://www.litcharts.com/lit/candide.