Marian Anderson sings on the steps of the Lincoln Memorial. (2013). The History Channel website. Retrieved 4:43, May 19, 2013, from http://www.history.com/this-day-in-history/marian-anderson-sings-on-the-steps-of-the-lincoln-memorial.
Marian Anderson sings on the steps of the Lincoln Memorial. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/marian-anderson-sings-on-the-steps-of-the-lincoln-memorial [Accessed 19 May 2013].
“Marian Anderson sings on the steps of the Lincoln Memorial.” 2013. The History Channel website. May 19 2013, 4:43 http://www.history.com/this-day-in-history/marian-anderson-sings-on-the-steps-of-the-lincoln-memorial.
“Marian Anderson sings on the steps of the Lincoln Memorial,” The History Channel website, 2013, http://www.history.com/this-day-in-history/marian-anderson-sings-on-the-steps-of-the-lincoln-memorial [accessed May 19, 2013].
“Marian Anderson sings on the steps of the Lincoln Memorial,” The History Channel website, http://www.history.com/this-day-in-history/marian-anderson-sings-on-the-steps-of-the-lincoln-memorial (accessed May 19, 2013).
Marian Anderson sings on the steps of the Lincoln Memorial [Internet]. The History Channel website; 2013 [cited 2013 May 19] Available from: http://www.history.com/this-day-in-history/marian-anderson-sings-on-the-steps-of-the-lincoln-memorial.
Marian Anderson sings on the steps of the Lincoln Memorial, http://www.history.com/this-day-in-history/marian-anderson-sings-on-the-steps-of-the-lincoln-memorial (last visited May 19, 2013).
Marian Anderson sings on the steps of the Lincoln Memorial. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/marian-anderson-sings-on-the-steps-of-the-lincoln-memorial. Accessed May 19, 2013.