PNG Bibliography
Mood (grammatical)
- BUGENHAGEN, Robert D., author. 1989. "Modality in Mangap-Mbula: An exploration of its syntax and semantics."
- ERDMAN, Laurens B.; GORING, Timothy, authors. 1992. "Is it real? Or is it even realis?."
- LEADERS, Marlin R., author. 1987. "Realis and irrealis verb markings in Middle Watut of Papua New Guinea."
- MANABE, Takashi, author. 1981. "A study of illocutionary force expressed through verbal suffixes and modal particles in Kwanga."
- ROBERTS, John R., author. 1994. The category ‘irrealis’ in Papuan medial verbs.
- SAYERS, Barbara J., author. 1977. Aboriginal world view and tense, mood and aspect in Wik-Munkan. Available online
- STRANGE, David, author. 1973. "Indicative and subjunctive in Upper Asaro."