It's easy to cite LitCharts for use in academic papers and reports.
MLA
Tanner, Alexandra. "Girl, Interrupted." LitCharts. LitCharts LLC, 8 May 2018. Web. 26 Jan 2021.
Chicago
Tanner, Alexandra. "Girl, Interrupted." LitCharts LLC, May 8, 2018. Retrieved January 26, 2021. https://www.litcharts.com/lit/girl-interrupted.