Krent, H. J. (2005). Presidential powers. New York University Press.
Lua i Stíl Chicago (17ú heag.)Krent, Harold J. Presidential Powers. New York: New York University Press, 2005.
Lua MLA (9ú heag.)Krent, Harold J. Presidential Powers. New York University Press, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.