Kremer. George Washington Carver. University of Missouri Press.
Lua i Stíl Chicago (17ú heag.)Kremer. George Washington Carver. University of Missouri Press.
Lua MLA (8ú heag.)Kremer. George Washington Carver. University of Missouri Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.