Thomas F. Jackson, Martin Luther King (Jr.) (2007). “From Civil Rights to Human Rights: Martin Luther King, Jr., and the Struggle for Economic Justice”, p.230, University of Pennsylvania Press
George Washington, John Jay, Jared Sparks (1850). “Washington's Farewell Address to the People of the United States of America”, p.33, New York : J. Wiley
"When the world feels dangerous, films showing the human experience are key, directors say". Interview with Mark Olsen and Yvonne Villarreal, www.latimes.com. January 5, 2017.