Simon Neuhaus. Das Genussystem Des Krongo. Master thesis, Universität Zürich, 2008.

Eduardo Undurraga; Jere Behrman; Elena Grigorenko; Alan Schultz; Julie Yiu; TAPS Bolivia Study Team; Ricardo Godoy. 2012. "Market and Non-market Returns To Formal Math Skills Among Adults in a Bolivian Native Amazonian Society." Online: http://www.tsimane.org/working%%20papers/TAPS-WP-72.pdf.

Lyle Campbell; B. Grimes. 2003. "International Encyclopedia of Linguistics, 4-Volume Set." edited by William J. Frawley. 1: 39. Online: http://tinyurl.com/jakalteko.

Office Public de la Langue Brettone. 2012. "Donneés Clés Sur Breton." Online: http://www.ofis-bzh.org/fr/langue_bretonne/chiffres_cles/index.php.

Dafydd Gibbon, Bruce Connell and Firmin Ahoua. 2006. "About Ega - EMELD School of Best Practices." In EMELD School of Best Practices, Institute for Language Information and Technology. Online: http://emeld.org/school/case/ega/about.html.

2012. "Samish Indian Nation." Online: www.samishtribe.nsn.us/language/.

Vu Truong. 2012. "Field Report On Jalkunan (Personal Communication)."

Rolf Kuschel. 1974. "A Lexicon of Signs From a Polynesian Outlier Island. Copenhagen: Psychological Laboratory, Copenhagen University."

James Woodward; Thanu Wongchai. 2011. "Original Chiangmai Sign Language."

Robert Williams, Angelika Jakobi and Jade Comfort. 2009. "The Uncunwee (Ghulfan) Documentation Project: Linking Language Documentation To Language Conservation." In Proceedings of Conference on language documentation & linguistic theory 2, edited by Peter Austin et al. London, School of Oriental and African Studies. Online: http://www.uncuproject.com/ldlt2_williams_doc_cons.pdf.