APA (7th ed.) Citation

Diffrient, N., Tilley, A. R., & Harman, D. (1981). Humanscale 4/5/6: A portfolio of information: 4. Human strength and safety, 5. Controls and displays, 6. Designing for people. MIT Press.

Chicago Style (17th ed.) Citation

Diffrient, Niels, Alvin R. Tilley, and David Harman. Humanscale 4/5/6: A Portfolio of Information: 4. Human Strength and Safety, 5. Controls and Displays, 6. Designing for People. Cambridge, Mass: MIT Press, 1981.

MLA (9th ed.) Citation

Diffrient, Niels, et al. Humanscale 4/5/6: A Portfolio of Information: 4. Human Strength and Safety, 5. Controls and Displays, 6. Designing for People. MIT Press, 1981.