| Koehn, Sally S. | Apalaí Verb Structure | 2009 | | Linguistics |
| Koehn, Edward H. | The Apalaí Phrase | 2009 | | Linguistics |
| Payne, David L | Some Widespread Grammatical Forms in South American Languages | 1990 | | Linguistics |
| Dooley, Robert A | The Positioning of Non-pronominal Clitics and Particles in Lowland South American Languages | 1990 | | Linguistics |
| Koehn, Sally S. | Gramática Pedagógica Apalaí | 1990 | | Linguistics |
| Derbyshire, Desmond C. and Geoffrey K. Pullum, editors | Handbook of Amazonian Languages, Vol. 1 | 1986 | | Linguistics |
| Koehn, Edward H.; Koehn, Sally S. | Notes on the Apalaí Language | 1964 | | Linguistics |
| Koehn, Sally S. | Processes and roles in Apalaí clause structure | 1974 | | Linguistics |
| Koehn, Edward H. | Bound Person Markers of the Apalaí Verb Phrase | 2009 | | Linguistics |
| Koehn, Edward H. and Sally S. Koehn | Apalai | 1986 | | Linguistics |
