Parsons, J. R. (1982). Prehistoric settlement patterns in the Southern Valley of Mexico: The Chalco-Xochimilco region. Museum of Anthropology, University of Michigan.
Lua i Stíl Chicago (17ú heag.)Parsons, Jeffrey R. Prehistoric Settlement Patterns in the Southern Valley of Mexico: The Chalco-Xochimilco Region. Ann Arbor, Mich: Museum of Anthropology, University of Michigan, 1982.
Lua MLA (9ú heag.)Parsons, Jeffrey R. Prehistoric Settlement Patterns in the Southern Valley of Mexico: The Chalco-Xochimilco Region. Museum of Anthropology, University of Michigan, 1982.
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