It's easy to cite LitCharts for use in academic papers and reports.
MLA
Saviano, Andrew. "Walden." LitCharts. LitCharts LLC, 15 Sep 2013. Web. 27 Jan 2021.
Chicago
Saviano, Andrew. "Walden." LitCharts LLC, September 15, 2013. Retrieved January 27, 2021. https://www.litcharts.com/lit/walden.