APA (7th ed.) Citation

Foerster, H. v., Peterson, L. L., Russell, J. K., & White, J. D. (1968). Purposive systems: Proceedings of the first annual symposium of the American Society for Cybernetics. Spartan Books.

Chicago Style (17th ed.) Citation

Foerster, Heinz von, Larry L. Peterson, John K. Russell, and John D. White. Purposive Systems: Proceedings of the First Annual Symposium of the American Society for Cybernetics. New York: Spartan Books, 1968.

MLA (9th ed.) Citation

Foerster, Heinz von, et al. Purposive Systems: Proceedings of the First Annual Symposium of the American Society for Cybernetics. Spartan Books, 1968.