APA (7th ed.) Citation
Hughes, D. R., & Piper, F. C. (1988). Design Theory: Daniel R. Hughes and Fred C. Piper. Univ. Press.
Chicago Style (17th ed.) Citation
Hughes, Daniel R., and Fred C. Piper. Design Theory: Daniel R. Hughes and Fred C. Piper. Cambridge: Univ. Press, 1988.
MLA (9th ed.) Citation
Hughes, Daniel R., and Fred C. Piper. Design Theory: Daniel R. Hughes and Fred C. Piper. Univ. Press, 1988.
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