Record producer John Hammond crusaded for racial integration in the music business, and is regarded as the most important nonmusician in the history of jazz.
John Hammond. (2013). The Biography Channel website. Retrieved 04:25, Jun 20, 2013, from http://www.biography.com/people/john-hammond-9326985.
John Hammond. [Internet]. 2013. The Biography Channel website. Available from: http://www.biography.com/people/john-hammond-9326985 [Accessed 20 Jun 2013].
"John Hammond." 2013. The Biography Channel website. Jun 20 2013, 04:25 http://www.biography.com/people/john-hammond-9326985.
"John Hammond," The Biography Channel website, 2013, http://www.biography.com/people/john-hammond-9326985 [accessed Jun 20, 2013].
"John Hammond," The Biography Channel website, http://www.biography.com/people/john-hammond-9326985 (accessed Jun 20, 2013).
John Hammond [Internet]. The Biography Channel website; 2013 [cited 2013 Jun 20] Available from: http://www.biography.com/people/john-hammond-9326985.
John Hammond, http://www.biography.com/people/john-hammond-9326985 (last visited Jun 20, 2013).
John Hammond. The Biography Channel website. 2013. Available at: http://www.biography.com/people/john-hammond-9326985. Accessed Jun 20, 2013.