It's easy to cite LitCharts for use in academic papers and reports.
Cosby, Matt. "In the Time of the Butterflies." <em>LitCharts.</em> LitCharts LLC, 7 Sep 2014. Web. 28 Oct 2016.
Cosby, Matt. "<em>In the Time of the Butterflies</em>." LitCharts LLC, September 7, 2014. Retrieved October 28, 2016. http://www.litcharts.com/lit/in-the-time-of-the-butterflies.