^Townsend, Richard F. (2000) The Aztecs. revised ed. Thames and Hudson, New York.
^Hassig, Ross (1988) Aztec Warfare: Imperial Expansion and Political Control. University of Oklahoma Press, Norman.
^Weaver, Muriel Porter (1993). The Aztecs, Maya, and Their Predecessors: Archaeology of Mesoamerica (3rd ed. ed.). San Diego: Academic Press. ISBN 0-01-263999-0.