The Sociolinguistic Situation of the Ambakich Language . Potter, Margaret; Philip Lambrecht; Laura Alemán; and Correna Janzen (2008) · SIL Electronic Survey Reports ·

Ethnologue: Languages of the World, 18th Edition . (2015) · edited by Lewis, M. Paul, Gary F. Simons, and Charles D. Fennig · SIL International http://www.ethnologue.com

Sepik languages: checklist and preliminary classification . Laycock, Donald C. (1973) · Pacific Linguistics · edited by Wurm, Stephen A. · Australian National University, Research School of Pacific Studies, Department of Linguistics