Melbourne: Oxford University Press O'Grady, Geoff; Ken Hale. 2004. The Coherence and Distinctiveness of the Pama–Nyungan Language Family within the Australian
University of California Press. Osborne T. 2005. Coherence: A dependency grammar analysis. SKY Journal of Linguistics 18, 223-286. Ouhalla, J. 1994. Transformational