Lewis, M. Paul (编). Ethnologue: Languages of the World Sixteenth edition. Dallas, Tex.: SIL International. 2009 [2012-06-16]. (原始内容存档于2012-10-19) (英语). 引文格式1维护:冗余文本 (link)
Lewis, M. Paul (编). Ethnologue: Languages of the World Sixteenth edition. Dallas, Tex.: SIL International. 2009 [2012-06-16]. (原始内容存档于2012-10-19) (英语). 引文格式1维护:冗余文本 (link)