- Author: Richard P. Aschmann
- Language: Quechua
- Year: 2007
- Author: Ronald William Beukema
- Language: English
- Year: 1975
![book Introducción al quichua de la sierra central del Ecuador o El quechua en diez lecciones fáciles (las otras 40 son más difíciles) = Introduction to Central Highland Quichua of Ecuador or Quichua in ten easy lessons (the other 40 are harder) [1963]](/covers/files_170/2930000/20123b78b317fc383a8888d9b2b18915-g.jpg)
- Author: Ellen M. Ross, Ricardo Asehmann (transl.)
- Language: Spanish English, Quechua
- Year: 2017
- Author: Juan Naula Guacho Donald H. Burns
- Language: Spanish
- Year: 1975
- Author: Pedro P. Guala Ch.
- Language: Quechua
- Year: 1982
- Author: Francisco Lema Guanolema
- Language: Spanish
- Year: 1997