"Ethnologue: Languages of the World, Fifteenth edition".CS1 maint: Multiple names: authors list (link) Fox, James J. (August 19–20, 2004).
“Ethnologue: Languages of the World, Fifteenth edition.”.  CS1 관리 - 여러 이름 (링크) Fox, James J. (August 19–20, 2004).