1. Assis, A.K.T., and J. P.M.C. Chaib, Ampère’s Electrodynamics: Analysis of the Meaning and Evolution of Ampère’s Force between Current Elements, Together with a Complete Translation of His Masterpiece: Theory of Electrodynamic Phenomena, Uniquely Deduced from Experience. Montreal: C. Roy Keys Inc., 2015.
2. Crafton, Donald. The talkies: American cinema’s transition to sound, 1926-1931. History of the American Cinema, edited by Charles Harpole 4. Berkeley: University of California Press, 1997.
3. Geduld, Harry M. The birth of the talkies: From Edison to Jolson. Bloomington/London: Indiana University Press, 1975.
4. Gitt, Robert. A century of sound: The history of sound in motion pictures. 5 videodiscs. Los Angeles: UCLA Film & Television Archive, 2007.
5. Gomery, Douglas, and Clara Pafort-Overduin. Movie history: A survey. 2nd ed. New York/London: Routledge, 1991.