It's easy to cite LitCharts for use in academic papers and reports.
Cao, Diana. "Roll of Thunder, Hear My Cry." <em>LitCharts.</em> LitCharts LLC, 11 May 2014. Web. 28 May 2017.
Cao, Diana. "<em>Roll of Thunder, Hear My Cry</em>." LitCharts LLC, May 11, 2014. Retrieved May 28, 2017. http://www.litcharts.com/lit/roll-of-thunder-hear-my-cry.