APA (7th ed.) Citation

Safari Tech Books Online, Rosenfeld, L. A., & Morville, P. C. (1998). Information architecture for the World Wide Web. O'Reilly.

Chicago Style (17th ed.) Citation

Safari Tech Books Online, Louis Author Rosenfeld, and Peter Contributor Morville. Information Architecture for the World Wide Web. [Place of publication not identified]: O'Reilly, 1998.

MLA (9th ed.) Citation

Safari Tech Books Online, et al. Information Architecture for the World Wide Web. O'Reilly, 1998.