Severo Ochoa was co-awarded the 1959 Nobel Prize in Physiology or Medicine for discovering an enzyme in bacteria that enables the synthesis of RNA.
Severa Ochoa. (2013). The Biography Channel website. Retrieved 05:21, May 19, 2013, from http://www.biography.com/people/severo-ochoa-9426631.
Severa Ochoa. [Internet]. 2013. The Biography Channel website. Available from: http://www.biography.com/people/severo-ochoa-9426631 [Accessed 19 May 2013].
"Severa Ochoa." 2013. The Biography Channel website. May 19 2013, 05:21 http://www.biography.com/people/severo-ochoa-9426631.
"Severa Ochoa," The Biography Channel website, 2013, http://www.biography.com/people/severo-ochoa-9426631 [accessed May 19, 2013].
"Severa Ochoa," The Biography Channel website, http://www.biography.com/people/severo-ochoa-9426631 (accessed May 19, 2013).
Severa Ochoa [Internet]. The Biography Channel website; 2013 [cited 2013 May 19] Available from: http://www.biography.com/people/severo-ochoa-9426631.
Severa Ochoa, http://www.biography.com/people/severo-ochoa-9426631 (last visited May 19, 2013).
Severa Ochoa. The Biography Channel website. 2013. Available at: http://www.biography.com/people/severo-ochoa-9426631. Accessed May 19, 2013.