Ancona, Eligio, “Historia de Yucatán: Desde la época más remota hasta nuestros dias,” Volume 1 – Primary source edition, Document 4, pp. 391-393.

California Department of Education and the Environment Initiative EEI curriculum units, “Sun Gods and Jaguar Kings,” and “Broken Jade and Tarnished Gold.”

Center for Justice & Accountability,

De Landa, F.D. (1566), Yucatán Before and After the Conquest. translated by Gates, William E. (1978), New York, NY;  Dover Publications, Inc., originally published  in 1937 by the Maya Society of Baltimore (Publication Number 20).