Citazione Stile APA (7a Edizione)
Howard, W. (1979). Gore Vidal's Caligula: A novel based on Gore Vidal's original screenplay. Warner books.
Citazione stile Chigago Style (17a edizione)
Howard, William. Gore Vidal's Caligula: A Novel Based on Gore Vidal's Original Screenplay. New York: Warner books, 1979.
Citatione MLA (9a ed.)
Howard, William. Gore Vidal's Caligula: A Novel Based on Gore Vidal's Original Screenplay. Warner books, 1979.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.