Laycock n.d.

Laycock, Donald C. n.d. Notebook D34 Selected Research Papers of Don Laycock on Languages in Papua New Guinea: Chenapian, Chambri, Bun, Kamasau (Sagi). Don Laycock (compiler). n.d. Pacific And Regional Archive for Digital Sources in Endangered Cultures (PARADISEC). paradisec.org.au/repository/DL2/items/043.

@misc{1542,
  author = {Laycock, Donald C.},
  title  = {Notebook D34 Selected Research Papers of Don Laycock on Languages in Papua New Guinea: Chenapian, Chambri, Bun, Kamasau (Sagi). Don Laycock (compiler). n.d. Pacific And Regional Archive for Digital Sources in Endangered Cultures (PARADISEC). paradisec.org.au/repository/DL2/items/043},
  year   = {n.d.}
}