Caius Gracchus, a tragedy

Chicago citation style
Robin, Joseph G., playwright. Caius Gracchus, a tragedy. [1920]. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/008588009. (Accessed September 23, 2018.)
APA citation style
Robin, Joseph G., playwright, ([1920]) Caius Gracchus, a tragedy. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/008588009
MLA citation style
Robin, Joseph G., playwright. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/008588009>.
Note: These citations are programmatically generated and may be incomplete.