Moseley, Edward; Gordon R. Willey (1973). „Aspero, Peru: A Reexamination of the Site and Its Implications“. American Antiquity. American Antiquity, Vol. 38, No. 4. 38 (4): 452–468. doi:10.2307/279151. ციტირების თარიღი: 2007-02-01. "We see the site as a 'peaking' of an essentially non-agricultural economy. Subsistence was still, basically, from the sea. But such subsistence supported a sedantry style of life, with communities of appreciable size."
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Moseley, Edward; Gordon R. Willey (1973). „Aspero, Peru: A Reexamination of the Site and Its Implications“. American Antiquity. American Antiquity, Vol. 38, No. 4. 38 (4): 452–468. doi:10.2307/279151. ციტირების თარიღი: 2007-02-01. "We see the site as a 'peaking' of an essentially non-agricultural economy. Subsistence was still, basically, from the sea. But such subsistence supported a sedantry style of life, with communities of appreciable size."
