Russell, C. H. (2006). Undaunted: A Norwegian woman in frontier Texas. Texas A&M University Press.
Lua i Stíl Chicago (17ú heag.)Russell, Charles H. Undaunted: A Norwegian Woman in Frontier Texas. College Station: Texas A&M University Press, 2006.
Lua MLA (9ú heag.)Russell, Charles H. Undaunted: A Norwegian Woman in Frontier Texas. Texas A&M University Press, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.