Roberts, John R. 1990. Modality in Amele and other Papuan languages. Journal of Linguistics 26. 363-401.
@article{Roberts-1990, author = {Roberts, John R.}, journal = {Journal of Linguistics}, pages = {363-401}, title = {Modality in Amele and other Papuan languages}, volume = {26}, year = {1990}, iso_code = {aey}, olac_field = {typology; general_linguistics; syntax}, wals_code = {ame} }