Credo includes a Topics area where you can view the material arranged by Topic rather than book

Here are some of the many titles available from Gale Virtual Reference Library

Sage Knowledge has a good collection of reference books with in-depth coverage of business topics.  Below are just three of the many resources available.

Reference books have many purposes.  They can give definitions, provide background on a topic, provide statistics, give a starting place for further research.  A good reference article can provide you with the basic knowledge in a field which will enable you to understand  more complex books and articles.  

We have a good E-Reference collection which can be searched in a number of ways.  You can use Summon to search them all at once. Or you can search the various collections individually.