APA (7th ed.) Citation

Hoffman, R. R., Lintern, G., & Eitelman, S. (2004). The Janus Principle. IEEE Intelligent Systems, 19(2), 78.

Chicago Style (17th ed.) Citation

Hoffman, Robert R., Gavan Lintern, and Susan Eitelman. "The Janus Principle." IEEE Intelligent Systems 19, no. 2 (2004): 78.

MLA (9th ed.) Citation

Hoffman, Robert R., et al. "The Janus Principle." IEEE Intelligent Systems, vol. 19, no. 2, 2004, p. 78.