Burger, RIchard, 1995. Chavin and the Origins of Andean Civilization. Thames & Hudson Press
Moseley, Michael, 2001. The Incas and Their Ancestors: The Archaeology of Peru.
Proulx, Donald, 1993. “The Nepeña Valley Survey: A Retrospective View,” in Ela’ Qua: Essays in Honor of Richard B. Woodbury, edited by Dorothy Krass, R. Brooke Thomas and John W. Cole, Pp. 225-236. Department of Anthropology Research Reports, No. 28. Amherst: Department of Anthropology, University of Massachusetts
Silverman, Elaine, 2004. Andean Archaeology. Wiley-Blackwell Publishing