Cantrell, S. (2010). Reference and Information Services in the 21st Century: An Introduction. 2nd ed. Medical Library Association.
Citação norma ChicagoCantrell, Sarah. Reference and Information Services in the 21st Century: An Introduction. 2nd Ed. Medical Library Association, 2010.
Citação norma MLACantrell, Sarah. Reference and Information Services in the 21st Century: An Introduction. 2nd Ed. Medical Library Association, 2010.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.