It's easy to cite LitCharts for use in academic papers and reports.
MLA
Sobel, Ben. "The Grapes of Wrath." LitCharts. LitCharts LLC, 17 Sep 2013. Web. 12 May 2021.
Chicago
Sobel, Ben. "The Grapes of Wrath." LitCharts LLC, September 17, 2013. Retrieved May 12, 2021. https://www.litcharts.com/lit/the-grapes-of-wrath.