Young, Jeffrey S.; Simon, William L. (2005). iCon: Steve Jobs. John Wiley & Sons. pp. 134. ISBN0-471-72083-6. Archived from the original on October 23, 2019. Retrieved August 1, 2019.
Young, Jeffrey S.; Simon, William L. (2005). iCon: Steve Jobs. John Wiley & Sons. pp. 134. ISBN0-471-72083-6. Archived from the original on October 23, 2019. Retrieved August 1, 2019.