APA (7th ed.) Citation

Duffy, T. M., & Waller, R. (1985). Designing usable texts. Academic Press.

Chicago Style (17th ed.) Citation

Duffy, Thomas M., and Robert Waller. Designing Usable Texts. Orlando: Academic Press, 1985.

MLA (9th ed.) Citation

Duffy, Thomas M., and Robert Waller. Designing Usable Texts. Academic Press, 1985.