Language classification : history and method / Lyle Campbell and William J. Poser
Cambridge University Press, 2008
eBooks
Barr, Donald F.
Languages of Central Sulawesi : checklist, preliminary classification, language maps, wordlists / by Donald F. Barr, Sharon G. Barr in cooperation with C. Salombe
Percetakan Universitas Cenderawasih, 1979
Buku Klasik
Wurm, Stephen Adolphe, 1922-
Papuan languages of Oceania
Narr, 1982
Buku Teks
Katzner, Kenneth
The languages of the world
Routledge, 1995
Buku Referensi
The World's major languages
edited by Bernard Comrie
Routledge, 1991
Buku Referensi