APA (7th ed.) Citation

Hughes, D. R., & Piper, F. C. (1985). Design theory (1. publ.). Cambridge Univ. Pr.

Chicago Style (17th ed.) Citation

Hughes, Daniel R., and Frederick C. Piper. Design Theory. 1. publ. Cambridge u.a: Cambridge Univ. Pr, 1985.

MLA (9th ed.) Citation

Hughes, Daniel R., and Frederick C. Piper. Design Theory. 1. publ. Cambridge Univ. Pr, 1985.

Warning: These citations may not always be 100% accurate.