APA (7th ed.) Citation

Smith, K. U., & Smith, M. F. (1966). Cybernetic principles of learning and educational design. Holt.

Chicago Style (17th ed.) Citation

Smith, Karl Ulrich, and Margaret Foltz Smith. Cybernetic Principles of Learning and Educational Design. New York: Holt, 1966.

MLA (9th ed.) Citation

Smith, Karl Ulrich, and Margaret Foltz Smith. Cybernetic Principles of Learning and Educational Design. Holt, 1966.