American author Robert Ludlum was an author of spy thrillers best known for writing The Bourne Identity and its sequels which have been translated to film.
Robert Ludlum. (2013). The Biography Channel website. Retrieved 02:17, May 24, 2013, from http://www.biography.com/people/robert-ludlum-9388564.
Robert Ludlum. [Internet]. 2013. The Biography Channel website. Available from: http://www.biography.com/people/robert-ludlum-9388564 [Accessed 24 May 2013].
"Robert Ludlum." 2013. The Biography Channel website. May 24 2013, 02:17 http://www.biography.com/people/robert-ludlum-9388564.
"Robert Ludlum," The Biography Channel website, 2013, http://www.biography.com/people/robert-ludlum-9388564 [accessed May 24, 2013].
"Robert Ludlum," The Biography Channel website, http://www.biography.com/people/robert-ludlum-9388564 (accessed May 24, 2013).
Robert Ludlum [Internet]. The Biography Channel website; 2013 [cited 2013 May 24] Available from: http://www.biography.com/people/robert-ludlum-9388564.
Robert Ludlum, http://www.biography.com/people/robert-ludlum-9388564 (last visited May 24, 2013).
Robert Ludlum. The Biography Channel website. 2013. Available at: http://www.biography.com/people/robert-ludlum-9388564. Accessed May 24, 2013.