You can read more about the Bayungu language in the following books and articles. For some of them a downloadable PDF is available and this is indicated by a clickable link.
Austin, Peter K. 1992. A dictionary of Payungu, Western Australia. La Trobe University, Department of Linguistics. 119pp.
Walgar, Hazel. 2007. Bayungu Body Parts Chart for Kids. Port Hedland: Wangka Maya.
Walgar, Hazel. 2007. Bayungu Phrasebook. Port Hedland: Wangka Maya.
These websites may be useful: Wangka Maya Glottolog Wikipedia Endangered Languages Project