^Watubela at Ethnologue (18th ed., 2015) (subscription required)
^Collins, J.T. (1986). "Eastern Seram: a subgrouping argument". In Geraghty, P., Carrington, L. and Wurm, S.A. eds, FOCAL II: Papers from the Fourth International Conference on Austronesian Linguistics. C-94:123-146. Pacific Linguistics, The Australian National University.
^Loski, Russell A. and Gail M. Loski (1989). "The languages indigenous to Eastern Seram and adjacent islands". In Wyn D. Laidig (ed.), Maluku (Workpapers in Indonesian Languages and Cultures, Vol. 6), 103-142. Ambon: Pattimura University and the Summer Institute of Linguistics.
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