APA (7th ed.) Citation

Lenat, D. B., Hayes-Roth, F., & Klahr, P. (1979). Cognitive economy. Rand.

Chicago Style (17th ed.) Citation

Lenat, Douglas B., Frederick Hayes-Roth, and Philip Klahr. Cognitive Economy. Santa Monica, Calif.: Rand, 1979.

MLA (9th ed.) Citation

Lenat, Douglas B., et al. Cognitive Economy. Rand, 1979.