Cita APA (7a ed.)

Cassell, K. A., & Hiremath, U. (2009). Reference and information services in the 21st century: An introduction (2nd ed.). Facet.

Cita Chicago Style (17a ed.)

Cassell, Kay Ann, y Uma Hiremath. Reference and Information Services in the 21st Century: An Introduction. 2nd ed. London: Facet, 2009.

Cita MLA (9a ed.)

Cassell, Kay Ann, y Uma Hiremath. Reference and Information Services in the 21st Century: An Introduction. 2nd ed. Facet, 2009.