Ambar, S. M. (2012). How governors built the modern American presidency. University of Pennsylvania Press.
Lua i Stíl Chicago (17ú heag.)Ambar, Saladin M. How Governors Built the Modern American Presidency. Philadelphia: University of Pennsylvania Press, 2012.
Lua MLA (9ú heag.)Ambar, Saladin M. How Governors Built the Modern American Presidency. University of Pennsylvania Press, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.