Osgood, D. W. S. (1970). The promise of power. Southern.
Lua i Stíl Chicago (17ú heag.)Osgood, De Witt S. The Promise of Power. Southern, 1970.
Lua MLA (9ú heag.)Osgood, De Witt S. The Promise of Power. Southern, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.