APA-čujuhus (7. p.)
Havinga, A., & Langer, N. (2015). Invisible languages in the nineteenth century. Peter Lang.
Chicago-čujuhus (17. p.)
Havinga, Anna, juo Nils Langer. Invisible Languages in the Nineteenth Century. Oxford, [England]: Peter Lang, 2015.
MLA-čujuhus (9. p.)
Havinga, Anna, juo Nils Langer. Invisible Languages in the Nineteenth Century. Peter Lang, 2015.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.