Endangered Languages Catalogue Project. Compiled by research teams at University of Hawai'i Mānoa and Institute for Language Information and Technology (LINGUIST List) at Eastern Michigan University . (2012) ·

World Oral Literature Project . http://www.oralliterature.org

The World Atlas of Language Structures . (2005) · edited by Bernard Comrie and David Gil and Martin Haspelmath and Matthew S. Dryer · Oxford University Press

Ethnologue: Languages of the World, 16th Edition (2009) . (2009) · edited by M. Paul Lewis · SIL International http://www.ethnologue.com/

Maring hunters and traders: production and exchange in the Papua New Guinea highlands . Healey, Christopher J. (1990) · Studies in Melanesian anthropology · Vol. 8 · Berkeley and Los Angeles: University of California Press

Maring sentences ( pp. 5-20 ) . Woodward, Lance B. (1973) · In Three studies in sentence structure Workpapers in Papua New Guinea Languages · Vol. 1 · edited by Alan Healey · Summer Institute of Linguistics