Here are some websites that set the standards for library reference services.

RUSA

The Reference and User Services Association "is responsible for stimulating and supporting excellence in the delivery of general library services and materials to adults, and the provision of reference and information services, collection development, and resource sharing for all ages, in every type of library."

There is a wealth of Reference Services information available through the RUSA website.  Here are a few key links:

• Definitions of a Reference Transaction
• Gudelines for Behavioral Performance of Reference and Information Service Providers
• Guidelines for Implementing and Maintaining Virtual Reference Services
• Professional Competencies for Reference and User Services Librarians