Schele, Linda, and David A. Freidel. 1990. A Forest of Kings: The Untold Story of the Ancient Maya. New York: William Morrow and Company, Inc.:244 Fig. VI.3
Schele, Linda, and David A. Freidel. 1990. A Forest of Kings: The Untold Story of the Ancient Maya. New York: William Morrow and Company, Inc.:375, Fig. 9:24
Schele, Linda, and Peter Mathews. 1998. The code of kings: the language of seven sacred Maya temples and tombs. New York: Scribner:8:247, Fig. 6.44