Merriam-Webster, 1999, 191–92* Chase, Diane Z. and Chase, Arlen F., "Mesoamerican Elites: An Archaeological Assessment", University of Oklahoma Press, 2003, ISBN 0-8061-3542-5, ISBN 978-0-8061-3542-7* Coe, Michael, Snow, Dean and Benson, Elizabeth P. "Atlas of Ancient America"; Facts on File, New York, 1986.
Merriam-Webster, 1999, 191–92* Chase, Diane Z. and Chase, Arlen F., "Mesoamerican Elites: An Archaeological Assessment", University of Oklahoma Press, 2003, ISBN 0-8061-3542-5, ISBN 978-0-8061-3542-7* Coe, Michael, Snow, Dean and Benson, Elizabeth P. "Atlas of Ancient America"; Facts on File, New York, 1986.