Althea Gibson becomes first African-American on U.S. tennis tour. (2013). The History Channel website. Retrieved 11:58, May 23, 2013, from http://www.history.com/this-day-in-history/althea-gibson-becomes-first-african-american-on-us-tennis-tour.
Althea Gibson becomes first African-American on U.S. tennis tour. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/althea-gibson-becomes-first-african-american-on-us-tennis-tour [Accessed 23 May 2013].
“Althea Gibson becomes first African-American on U.S. tennis tour.” 2013. The History Channel website. May 23 2013, 11:58 http://www.history.com/this-day-in-history/althea-gibson-becomes-first-african-american-on-us-tennis-tour.
“Althea Gibson becomes first African-American on U.S. tennis tour,” The History Channel website, 2013, http://www.history.com/this-day-in-history/althea-gibson-becomes-first-african-american-on-us-tennis-tour [accessed May 23, 2013].
“Althea Gibson becomes first African-American on U.S. tennis tour,” The History Channel website, http://www.history.com/this-day-in-history/althea-gibson-becomes-first-african-american-on-us-tennis-tour (accessed May 23, 2013).
Althea Gibson becomes first African-American on U.S. tennis tour [Internet]. The History Channel website; 2013 [cited 2013 May 23] Available from: http://www.history.com/this-day-in-history/althea-gibson-becomes-first-african-american-on-us-tennis-tour.
Althea Gibson becomes first African-American on U.S. tennis tour, http://www.history.com/this-day-in-history/althea-gibson-becomes-first-african-american-on-us-tennis-tour (last visited May 23, 2013).
Althea Gibson becomes first African-American on U.S. tennis tour. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/althea-gibson-becomes-first-african-american-on-us-tennis-tour. Accessed May 23, 2013.