Olkkonen n.d.

Olkkonen, Soini. n.d. [Data supplied by Soini Olkkonen, SIL Papua New Guinea.].

@misc{5422,
  author = {Olkkonen, Soini},
  title  = {[Data supplied by Soini Olkkonen, SIL Papua New Guinea.]},
  year   = {n.d.}
}