Reesink 2002, pp. 29–30. Reesink, Ger P. (2002). "The eastern Bird's Head languages compared". In Reesin, Ger P. (ed.). Languages of the eastern Bird's Head. Canberra: Pacific Linguistics. pp. 1–44. doi:10.15144/PL-524.1. hdl:1885/146144. ISBN9780858834941.
Reesink 2002, pp. 29–30. Reesink, Ger P. (2002). "The eastern Bird's Head languages compared". In Reesin, Ger P. (ed.). Languages of the eastern Bird's Head. Canberra: Pacific Linguistics. pp. 1–44. doi:10.15144/PL-524.1. hdl:1885/146144. ISBN9780858834941.
Steinhauer 2005. Steinhauer, Hein (2005). "Biak". The Austronesian languages of Asia and Madagascar. Routledge language family series. Vol. 7. London: Routledge. ISBN9780700712861. OCLC53814161.