It's easy to cite LitCharts for use in academic papers and reports.
MLA
Mueller, Bethany. "Out of the Silent Planet." LitCharts. LitCharts LLC, 23 Jul 2017. Web. 11 Apr 2021.
Chicago
Mueller, Bethany. "Out of the Silent Planet." LitCharts LLC, July 23, 2017. Retrieved April 11, 2021. https://www.litcharts.com/lit/out-of-the-silent-planet.