Nikola Tesla. (2014). The Biography.com website. Retrieved 09:46, Apr 08, 2014, fromhttp://www.biography.com/people/nikola-tesla-9504443
Nikola Tesla. (2014). inventors.about.com website. Retrieved 11:30 PM Apr 2, 2014, from http://inventors.about.com/od/tstartinventions/a/Nikola_Tesla.html
Nikola Tesla Universe (2014) Tesla Universe.com website. Retrieved 11:40 Apr 2, 2014, from http://www.teslauniverse.com/
Nikola Tesla. (2014). inventors.about.com website. Retrieved 11:30 PM Apr 2, 2014, from http://inventors.about.com/od/tstartinventions/a/Nikola_Tesla.html
Nikola Tesla Universe (2014) Tesla Universe.com website. Retrieved 11:40 Apr 2, 2014, from http://www.teslauniverse.com/