Schlaepfer, G. G. (2005). The Louisiana Purchase. Franklin Watts.
Lua i Stíl Chicago (17ú heag.)Schlaepfer, Gloria G. The Louisiana Purchase. Franklin Watts, 2005.
Lua MLA (8ú heag.)Schlaepfer, Gloria G. The Louisiana Purchase. Franklin Watts, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.