APA (7th ed.) Citation

Gregory, R. H., & Horn, R. L. v. (1960). Automatic data-processing systems: Principles and procedures ([1st ed.].). Chatto and Windus.

Chicago Style (17th ed.) Citation

Gregory, Robert H., and Richard L. van Horn. Automatic Data-processing Systems: Principles and Procedures. [1st ed.]. London: Chatto and Windus, 1960.

MLA (9th ed.) Citation

Gregory, Robert H., and Richard L. van Horn. Automatic Data-processing Systems: Principles and Procedures. [1st ed.]. Chatto and Windus, 1960.