APA (7th ed.) Citation

Cassell, K. A., & Hiremath, U. (2006). Reference and information services in the 21st century: An introduction. Facet.

Chicago Style (17th ed.) Citation

Cassell, Kay Ann, and Uma Hiremath. Reference and Information Services in the 21st Century: An Introduction. London: Facet, 2006.

MLA (9th ed.) Citation

Cassell, Kay Ann, and Uma Hiremath. Reference and Information Services in the 21st Century: An Introduction. Facet, 2006.