It's easy to cite LitCharts for use in academic papers and reports.
MLA
Florman, Ben. "Heart of Darkness." LitCharts. LitCharts LLC, 22 Jul 2013. Web. 19 Apr 2021.
Chicago
Florman, Ben. "Heart of Darkness." LitCharts LLC, July 22, 2013. Retrieved April 19, 2021. https://www.litcharts.com/lit/heart-of-darkness.