Stanhope, John M. 1980. The Language of the Rao People, Grengabu, Madang Province, Papua New Guinea. (Pacific Linguistics D, 18.) Canberra: Australian National University.
@book{sinnemakizeromarking-Stanhope1980, address = {Canberra}, author = {Stanhope, John M.}, publisher = {Australian National University}, series = {Pacific Linguistics D}, title = {The Language of the Rao People, Grengabu, Madang Province, Papua New Guinea}, volume = {18}, year = {1980} }