1. ^{{cite web | url=http://www.wdl.org/en/item/6709/ | title=Hueytozoztli, Continuation of the Festival of Bird Sacrifices, the Fourth Month of the Aztec Solar Calendar | publisher=World Digital Library | accessdate=21 July 2013}}
2. ^{{cite book|author=Alexander von Humboldt|title=Researches, Concerning the Institutions & Monuments of the Ancient Inhabitants of America: With Descriptions & Views of Some of the Most Striking Scenes in the Cordilleras!|url=https://books.google.com/books?id=qttS5c_70XIC&pg=PA295|accessdate=21 July 2013|year=1814|publisher=Longman, Hurst, Rees, Orme & Brown, J. Murray & H. Colburn|pages=295–}}
3. ^{{cite book|author=Manuel Aguilar Moreno|title=Handbook to Life in the Aztec World|url=https://books.google.com/books?id=ZseasJq3WzEC&pg=PA296|accessdate=25 July 2013|date=12 September 2007|publisher=Oxford University Press|isbn=978-0-19-533083-0|pages=296–}}
4. ^{{cite web|url=http://www.amoxtli.org/cuezali/festivals.html |title=The Aztec Festivals |publisher=www.amoxtli.org |accessdate=25 July 2013 |deadurl=yes |archiveurl=https://web.archive.org/web/20130821054649/http://www.amoxtli.org/cuezali/festivals.html |archivedate=21 August 2013 |df= }}