APA (7th ed.) Citation

Ritchie, D. (1986). The computer pioneers: The making of the modern computer. Simon and Schuster.

Chicago Style (17th ed.) Citation

Ritchie, David. The Computer Pioneers: The Making of the Modern Computer. New York: Simon and Schuster, 1986.

MLA (9th ed.) Citation

Ritchie, David. The Computer Pioneers: The Making of the Modern Computer. Simon and Schuster, 1986.