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) ·

"A dictionary of Eastern Penan" HRELP Abstract . Sercombe, Peter (2003) · http://www.hrelp.org/grants/projects/index.php?projid=27

Glottolog . http://www.glottolog.org/glottolog/

Introduction . Bernard Sellato and Peter Sercombe (2006) · In Beyond the green myth: Borneo's hunter-gatherers int he 21st century edited by Peter Sercombe and Bernard Sellato · Copenhagen: Nordic Institute of Asian Studies

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

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

A Study of the Punan Busang ( pp. 235-300 ) . D. B. Ellis (1972) · Sarawak Museum Journal. 20

Punan Ba ( pp. 24-36 ) . Rodney Needham (1955) · Journal of the Malayan Branch of the Royal Asiatic Society. 28

Melanau and the Languages of Central Sarawak . Rensch, Calvin R (2012) · http://www.sil.org/resources/publications/entry/47763

To Be or Not to Be: Challenges Facing Eastern Penan in Borneo ( pp. 191-203 ch. 11 ) . Peter Sercombe (2009) · In Endangered Languages of Austronesia edited by Margaret Florey · Oxford University Press http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199544547.001.0001/acprof-9780199544547-chapter-11