Anders Sirén: Changing Interactions between Humans and Nature in Sarayaku, Ecuadorian Amazon. Acta Universitatis Agriculturae Sueciae, Agraria 447 (Doctoral thesis, Swedish University of Agricultural Sciences), Uppsala 2004.

"https://qu.wikipedia.org/w/index.php?title=Plantilla:Ref_Siren&oldid=629762" p'anqamanta chaskisqa (Wikipedia, Qhichwa / Quechua)