Foreman, Velma and Marten, Helen. 1973. Yessan-Mayo Phonemes. In Healey, Alan (ed.), Phonologies of Three Languages of Papua New Guinea, 79–108. Ukarumpa: Summer Institute of Linguistics.
@incollection{foremanmarten1973, address = {Ukarumpa}, author = {Foreman, Velma and Marten, Helen}, booktitle = {Phonologies of Three Languages of Papua New Guinea}, editor = {Healey, Alan}, pages = {79–108}, publisher = {Summer Institute of Linguistics}, series = {Workpapers in Papua New Guinea Languages}, title = {Yessan-Mayo Phonemes}, volume = {2}, year = {1973} }