Classics of public administration by The books listed below provide definitions or explanations of public administration concepts, terms and theories.
Encyclopedia of public administration and public policy by 
International dictionary of public management and governance by Below are links to organizations and think tanks devoted to the practice or study of public administration and policy as well as subject related issues. Look for terms such as "library" or "publications" for studies and articles.
The journals listed below are key public administration academic journals and provide critical analyses of relevant issues. The articles in these academic journals tend to be in-depth and contain bibliographies that may be useful in compiling more information on a topic.