Wonders of Latin America: Puzzling Pyramids of Mexico. (2013). The History Channel website. Retrieved 10:06, June 19, 2013, from http://www.history.com/videos/wonders-of-latin-america-puzzling-pyramids-of-mexico.
Wonders of Latin America: Puzzling Pyramids of Mexico. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/videos/wonders-of-latin-america-puzzling-pyramids-of-mexico [Accessed 19 Jun 2013].
“Wonders of Latin America: Puzzling Pyramids of Mexico.” 2013. The History Channel website. Jun 19 2013, 10:06 http://www.history.com/videos/wonders-of-latin-america-puzzling-pyramids-of-mexico.
“Wonders of Latin America: Puzzling Pyramids of Mexico,” The History Channel website, 2013, http://www.history.com/videos/wonders-of-latin-america-puzzling-pyramids-of-mexico [accessed Jun 19, 2013].
“Wonders of Latin America: Puzzling Pyramids of Mexico,” The History Channel website, http://www.history.com/videos/wonders-of-latin-america-puzzling-pyramids-of-mexico (accessed Jun 19, 2013).
Wonders of Latin America: Puzzling Pyramids of Mexico [Internet]. The History Channel website; 2013 [cited 2013 Jun 19] Available from: http://www.history.com/videos/wonders-of-latin-america-puzzling-pyramids-of-mexico.
Wonders of Latin America: Puzzling Pyramids of Mexico, http://www.history.com/videos/wonders-of-latin-america-puzzling-pyramids-of-mexico (last visited Jun 19, 2013).
Wonders of Latin America: Puzzling Pyramids of Mexico. The History Channel website. 2013. Available at: http://www.history.com/videos/wonders-of-latin-america-puzzling-pyramids-of-mexico. Accessed Jun 19, 2013.