Hoeller, Alfredo. 1932. Grammatik der Guarayo-Sprache. Guarayos, Bolivia: Missionsprokura der P.P. Franziskaner.
@book{Hoeller-1932, address = {Guarayos, Bolivia}, author = {Hoeller, Alfredo}, publisher = {Missionsprokura der P.P. Franziskaner}, title = {Grammatik der Guarayo-Sprache}, year = {1932} }