American physicist Robert A. Milikan is best known for measuring the charge on the electron, for which he won the Nobel Prize in Physics in 1923.
Robert Andrews Millikan. (2013). The Biography Channel website. Retrieved 06:42, May 18, 2013, from http://www.biography.com/people/robert-a-millikan-9408867.
Robert Andrews Millikan. [Internet]. 2013. The Biography Channel website. Available from: http://www.biography.com/people/robert-a-millikan-9408867 [Accessed 18 May 2013].
"Robert Andrews Millikan." 2013. The Biography Channel website. May 18 2013, 06:42 http://www.biography.com/people/robert-a-millikan-9408867.
"Robert Andrews Millikan," The Biography Channel website, 2013, http://www.biography.com/people/robert-a-millikan-9408867 [accessed May 18, 2013].
"Robert Andrews Millikan," The Biography Channel website, http://www.biography.com/people/robert-a-millikan-9408867 (accessed May 18, 2013).
Robert Andrews Millikan [Internet]. The Biography Channel website; 2013 [cited 2013 May 18] Available from: http://www.biography.com/people/robert-a-millikan-9408867.
Robert Andrews Millikan, http://www.biography.com/people/robert-a-millikan-9408867 (last visited May 18, 2013).
Robert Andrews Millikan. The Biography Channel website. 2013. Available at: http://www.biography.com/people/robert-a-millikan-9408867. Accessed May 18, 2013.