It's easy to cite LitCharts for use in academic papers and reports.
MLA
Tanner, Alexandra. "I for Isobel." LitCharts. LitCharts LLC, 30 Jun 2018. Web. 22 Jan 2021.
Chicago
Tanner, Alexandra. "I for Isobel." LitCharts LLC, June 30, 2018. Retrieved January 22, 2021. https://www.litcharts.com/lit/i-for-isobel.