Source: Evans et al (2017)
Evans, Nicholas, Wayan Arka, Matthew Carroll, Christian Döhler, Eri Kashima, Emil Mittag, Volker Gast, Dineke Schokkin, Kyla Quinn, Jeff Siegel, Philip Tama and Charlotte Van Tongeren. 2017. The languages of Southern New Guinea. In Bill Palmer (ed.), The Languages and Linguistics of New Guinea: A Comprehensive Guide. Berlin: Walter de Gruyter.