Schele & Matthews (1999) The Code of Kings: The language of seven sacred Maya temples and tombs, Touchstone/Simon & Schuster, New York. ISBN978-0-684-85209-6.
Sharer, Robert J. (1994). The Ancient Maya. Stanford University Press. ISBN0-8047-2130-0.
Weaver, Muriel Porter (1993). The Aztecs, Maya, and Their Predecessors: Archaeology of Mesoamerica (3rd ed.). San Diego: Academic Press. ISBN0-01-263999-0.