Reference and information services in the 21st century an introduction

Manylion Llyfryddiaeth
Prif Awdur: Cassell, Kay Ann
Awduron Eraill: Hiremath, Uma
Fformat: Llyfr
Iaith:English
Cyhoeddwyd: New York Neal-Schuman Publishers c2009.
Rhifyn:2nd ed.
Pynciau: