Robert E. Park was an American sociologist most interested in urban issues and the question of assimilation as it pertained to immigrants in the United States.
Robert Ezra Park. (2013). The Biography Channel website. Retrieved 05:59, May 21, 2013, from http://www.biography.com/people/robert-e-park-9433327.
Robert Ezra Park. [Internet]. 2013. The Biography Channel website. Available from: http://www.biography.com/people/robert-e-park-9433327 [Accessed 21 May 2013].
"Robert Ezra Park." 2013. The Biography Channel website. May 21 2013, 05:59 http://www.biography.com/people/robert-e-park-9433327.
"Robert Ezra Park," The Biography Channel website, 2013, http://www.biography.com/people/robert-e-park-9433327 [accessed May 21, 2013].
"Robert Ezra Park," The Biography Channel website, http://www.biography.com/people/robert-e-park-9433327 (accessed May 21, 2013).
Robert Ezra Park [Internet]. The Biography Channel website; 2013 [cited 2013 May 21] Available from: http://www.biography.com/people/robert-e-park-9433327.
Robert Ezra Park, http://www.biography.com/people/robert-e-park-9433327 (last visited May 21, 2013).
Robert Ezra Park. The Biography Channel website. 2013. Available at: http://www.biography.com/people/robert-e-park-9433327. Accessed May 21, 2013.