Townshend, Dale, and Angela Wright. “Gothic and Romantic: An Historical Overview.” Romantic Gothic, Edinburgh University Press, 2015, pp. 1–34, https://doi.org/10.3366/j.ctt1bgzd5s.3.
Burke, Edmund. A Philosophical Enquiry Into the Origin of Our Ideas of the Sublime and Beautiful: With an Introductory Discourse Concerning Taste. United States, Harper, 1863.