Reference and Information Services in the 21st Century:
An Introduction, Second Edition

By Kay Ann Cassell and Uma Hiremath

There are over one thousand reference resources listed in this book. The hybridization of information sources; the multiplication and diversification of reference services; and the sheer exuberance of communicable information, makes the constant updating of resources an imperative.

Readers and practitioners who come upon an interesting new relevant resource, trend, or a change in existing resources not noted by us, are invited to send in the information to 21reference@gmail.com. Updates, new annotated bibliographies, and any emerging trends, will be added to this site biannually in January and August of each year. Check back in January 2010 for the first updates.