APA (7th ed.) Citation

Smith, J. D. (1991). Object-oriented programming with the X window system toolkits. John Wiley.

Chicago Style (17th ed.) Citation

Smith, Jerry D. Object-oriented Programming with the X Window System Toolkits. New York: John Wiley, 1991.

MLA (8th ed.) Citation

Smith, Jerry D. Object-oriented Programming with the X Window System Toolkits. John Wiley, 1991.