Branks, T. and Branks, J. 1973. Fonologia del Guambiano. (Sistemas fonologicos de idiomas colombianos, 2.) Loma Linda, Colombia: Summer Institute of Linguistcs.
@book{branksbranks1973, address = {Loma Linda, Colombia}, author = {Branks, T. and Branks, J.}, publisher = {Summer Institute of Linguistcs}, series = {Sistemas fonologicos de idiomas colombianos}, title = {Fonologia del Guambiano}, volume = {2}, year = {1973} }