Earthquake and volcano do double damage in Mexico. (2013). The History Channel website. Retrieved 7:19, June 20, 2013, from http://www.history.com/this-day-in-history/earthquake-and-volcano-do-double-damage-in-mexico.
Earthquake and volcano do double damage in Mexico. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/earthquake-and-volcano-do-double-damage-in-mexico [Accessed 20 Jun 2013].
“Earthquake and volcano do double damage in Mexico.” 2013. The History Channel website. Jun 20 2013, 7:19 http://www.history.com/this-day-in-history/earthquake-and-volcano-do-double-damage-in-mexico.
“Earthquake and volcano do double damage in Mexico,” The History Channel website, 2013, http://www.history.com/this-day-in-history/earthquake-and-volcano-do-double-damage-in-mexico [accessed Jun 20, 2013].
“Earthquake and volcano do double damage in Mexico,” The History Channel website, http://www.history.com/this-day-in-history/earthquake-and-volcano-do-double-damage-in-mexico (accessed Jun 20, 2013).
Earthquake and volcano do double damage in Mexico [Internet]. The History Channel website; 2013 [cited 2013 Jun 20] Available from: http://www.history.com/this-day-in-history/earthquake-and-volcano-do-double-damage-in-mexico.
Earthquake and volcano do double damage in Mexico, http://www.history.com/this-day-in-history/earthquake-and-volcano-do-double-damage-in-mexico (last visited Jun 20, 2013).
Earthquake and volcano do double damage in Mexico. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/earthquake-and-volcano-do-double-damage-in-mexico. Accessed Jun 20, 2013.