Cassell, K. A., & Hiremath, U. (2011). Reference and information services in the 21st century: An introduction (2nd ed. rev.). Neal-Schuman Publishers.
Citação norma ChicagoCassell, Kay Ann, and Uma Hiremath. Reference and Information Services in the 21st Century: An Introduction. 2nd ed. rev. New York: Neal-Schuman Publishers, 2011.
Citação norma MLACassell, Kay Ann, and Uma Hiremath. Reference and Information Services in the 21st Century: An Introduction. 2nd ed. rev. Neal-Schuman Publishers, 2011.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.