Bring readers into some of your research into the history and origins of the genre. By introducing these sources and commenting on what insights they raise, you can give readers important, yet brief context for the genre (assume that readers don’t know it) and set up the rest of the essay to move beyond just establishing how the genre got started. This necessary context for readers can also help you, as a scholar, better understand how the genre came to be and what might be important to notice about the genre’s beginnings or the place it is from.
You will likely find many sources such as books (chapters), academic journal, magazine, and newspaper articles.
AND any combination of the following relevant to your option
Other -- confirm with Professor Kerr
If you will be using less "traditional", documented sources, be sure to confirm that the source is acceptable by first consulting with your instructor.