Barrett, S. A. 1925. The Cayapa Indians of Ecuador. Indian Notes and Monographs 40. 1-476. New York: Haye Foundation.
@article{barrett1925, author = {Barrett, S. A.}, journal = {Indian Notes and Monographs}, key = {Barrett (1925)}, pages = {1-476}, publisher = {New York: Haye Foundation}, title = {The Cayapa Indians of Ecuador}, volume = {40}, year = {1925} }