Tài liệu tham khảo WikiPedia: Chan_Chan http://www.historychannel.com/classroom/unesco/cha... http://www.peruviantimes.com/archaeologists-restor... http://www.peruviantimes.com/heavy-rains-threaten-... http://www.smithsonian.com http://www.tiwanakuarcheo.net/7_flash/chan/chancha... //dx.doi.org/10.2307%2F208132 //dx.doi.org/10.7183%2F1045-6635.22.1.37 //www.jstor.org/stable/208132 //www.jstor.org/stable/23072515 http://whc.unesco.org/en/list/366
