Campbell-Kelly, M., Aspray, W., Ensmenger, N., & Yost, J. R. (2014). Computer: A history of the information machine (Third edition.). Westview Press, A Member of the Perseus Books Group.

Campbell-Kelly, Martin, William Aspray, Nathan Ensmenger, and Jeffrey R. Yost. Computer: A History of the Information Machine. Third edition. Boulder, CO: Westview Press, A Member of the Perseus Books Group, 2014.

Campbell-Kelly, Martin, et al. Computer: A History of the Information Machine. Third edition. Westview Press, A Member of the Perseus Books Group, 2014.