Kastor, P. J. (2004). The nation's crucible: The Louisiana Purchase and the creation of America. Yale University Press.
Lua i Stíl Chicago (17ú heag.)Kastor, Peter J. The Nation's Crucible: The Louisiana Purchase and the Creation of America. New Haven: Yale University Press, 2004.
Lua MLA (9ú heag.)Kastor, Peter J. The Nation's Crucible: The Louisiana Purchase and the Creation of America. Yale University Press, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.