Rybka, Konrad (June 2015). State-of-the-Art in the Development of the Lokono Language. University of Hawaii Press. OCLC919313664.
Brown, E. K. Ogilvie, Sarah. (2009). Concise encyclopedia of languages of the world. Elsevier. ISBN9780080877747. OCLC264358379.{{cite book}}: CS1 maint: multiple names: authors list (link)