Usner, D. H. (2009). Indian work: Language and livelihood in Native American history. Harvard University Press.
Lua i Stíl Chicago (17ú heag.)Usner, Daniel H. Indian Work: Language and Livelihood in Native American History. Cambridge, Mass.: Harvard University Press, 2009.
Lua MLA (9ú heag.)Usner, Daniel H. Indian Work: Language and Livelihood in Native American History. Harvard University Press, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.