Endangered Languages Catalogue Project. Compiled By Research Teams At University of Hawai'i Mānoa and Eastern Michigan University . (2015) ·

Language isolates in the New Guinea region . Harald Hammarström (2017) · In Language isolates edited by Lyle Campbell, Thomas Dougherty, and Alexander D. Smith · London: Routledge

Glottolog 2.3 . Hammarström, Harald & Forkel, Robert & Haspelmath, Martin & Nordhoff, Sebastian (2014) · http://glottolog.org

Dialect survey report of the Kamula language, Western province . Routamaa, Iska and Judy Routamaa (2008 [1996-07]) ·

Languages of the Aramia River Area ( pp. 1-37 ) . Ger P. Reesink (1976) · In Papers in New Guinea Linguistics 19 Pacific Linguistics: Series A · Vol. 45 · Canberra: Research School of Pacific and Asian Studies, Australian National University

Kamula grammar essentials . Routamaa, Judy (1994) · http://www-01.sil.org/pacific/png/pubs/928474531163/Kamula_gram_essent.pdf

The Bosavi Language Family . Shaw, Daniel (1986) · Pacific Linguistics A-70 · Australian National University.