Purba, Theodorus T. and Yulini R. 2002. "The Complexity of the Ormu Verb System." In Proceedings of an international conference on New Guinea languages and linguistics, edited by Don A.L. Flassy and Otto I.M.S. Nekitel. 200-228. Jakarta: Balai Pustaka.

Prentice, David J. 1971. "The Murut Languages of Sabah." 18: Canberra: Research School of Pacific and Asian Studies, Australian National University.

Polinskaya, M. C. 1995. Jazyk Niuè. Moscow: Akademia Nauk SSSR.

Pöch, Rudolf. 1907. "Wanderungen Im Gebiete Der Kai (Deutsch-Neuguinea)." In Mittheilungen aus den deutschen Schutzgebieten, 20: 223-231.

Ploeg, Anton. 1995. "First Contact, in the Highlands of Irian Jaya." In Journal of Pacific History, 30 , no. 2: 227-239.

Piper, N. A Sketch Grammar of Meryam Mer. Master thesis, Canberra: Australian National University, 1989.

Pennoyer, F. D. 1986/1987. "Inati: the Hidden Negrito Language of Panay, Philippines." In Philippine Journal of Linguistics, 18/19: 1-36.

Peiros, Ilia. 2008. "The Formosan Language Family." In Past Human Migrations in East Asia: Matching archaeology, linguistics and genetics, edited by Alicia Sanchez-Mazas et al.. 5: 182-210. London & New York: Routledge.

Peekel, P. G. 1929-1930. "Grammatische Grundzüge Und Wörterverzeichnis Der Label-Sprache." In Zeitschrift für Eingeborenensprachen, XX: 10-34, 92-120.

Peckham, Lloyd. 1991. "Etna Bay Survey Report: Irian Jaya Bird's Neck Languages." In Workpapers in Indonesian Languages and Cultures, 10: 147-185.