Hogan, David W. 1988. "Urak Lawoi': Basic Structures and a Dictionary." 109: Canberra: Research School of Pacific and Asian Studies, Australian National University.
Phyllis Hischier. 2006. "Exploration of the Remote Kopayap and Urajin Areas in West Papua, Indonesia: A First Contact in Kopayap and Urajin."
Nikolaus P. Himmelmann. 2001. "Sourcebook On Tomini-Tolitoi Languages: General Information and Word Lists." 511: Canberra: Research School of Pacific and Asian Studies, Australian National University.
Barry Hewlett. 1996. "Cultural Diversity Among African Pygmies." In Cultural diversity among twentieth-century foragers: an African perspective, edited by Susan Kent. 215-244. Cambridge University Press.
Healey, Christopher J. 1990. "Maring Hunters and Traders: Production and Exchange in the Papua New Guinea Highlands." 8: Berkeley and Los Angeles: University of California Press.