APA-čujuhus (7. p.)
North, B. (2000). The development of a common framework scale of language proficiency. Peter Lang.
Chicago-čujuhus (17. p.)
North, Brian. The Development of a Common Framework Scale of Language Proficiency. New York: Peter Lang, 2000.
MLA-čujuhus (9. p.)
North, Brian. The Development of a Common Framework Scale of Language Proficiency. Peter Lang, 2000.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.