St. Louis post-dispatch. (1929). The drift of civilization. Simon and Schuster.
Lua i Stíl Chicago (17ú heag.)St. Louis post-dispatch. The Drift of Civilization. New York: Simon and Schuster, 1929.
Lua MLA (9ú heag.)St. Louis post-dispatch. The Drift of Civilization. Simon and Schuster, 1929.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.