(en) J. K. Van Dover, Making the Detective Story American : Biggers, Van Dine and Hammett and the Turning Point of the Genre, 1925–1930, No Chinaman, Ethnicity and the Dectective in the 1920s, McFarland, , 231 p. (ISBN978-0-7864-5689-5, lire en ligne), p. 66