Johnson, Orville E. and Levinsohn, Stephen H. 1990. Gramatica Secoya. (Cuadernos Etnolingüísticos, 11.) Quito: Instituto Lingüístico de Verano.
@book{Johnson-and-Levinsohn-1990, address = {Quito}, author = {Johnson, Orville E. and Levinsohn, Stephen H.}, publisher = {Instituto Lingüístico de Verano}, series = {Cuadernos Etnolingüísticos}, title = {Gramatica Secoya}, volume = {11}, year = {1990}, iso_code = {sey}, olac_field = {general_linguistics; typology; syntax; semantics}, wals_code = {sec} }