APA (7th ed.) Citation

Hayes-Roth, F. (1985). Rule-based systems. Communications of the ACM, 28, 921. https://doi.org/10.1145/4284.4286

Chicago Style (17th ed.) Citation

Hayes-Roth, Frederick. "Rule-based Systems." Communications of the ACM 28 (1985): 921. https://doi.org/10.1145/4284.4286.

MLA (9th ed.) Citation

Hayes-Roth, Frederick. "Rule-based Systems." Communications of the ACM, vol. 28, 1985, p. 921, https://doi.org/10.1145/4284.4286.