It's easy to cite LitCharts for use in academic papers and reports.
MLA
Dillon, Sophie. "The Ones Who Walk Away from Omelas." LitCharts. LitCharts LLC, 28 Feb 2018. Web. 28 Sep 2020.
Chicago
Dillon, Sophie. "The Ones Who Walk Away from Omelas." LitCharts LLC, February 28, 2018. Retrieved September 28, 2020. https://www.litcharts.com/lit/the-ones-who-walk-away-from-omelas.