You may find this book about doing library research useful:

• The Oxford Guide to Library Research / Thomas Mann (2015)

Subject guides are a good place to get started.  They will give you an overview of the topic.

• Philosophy
• Gender Studies
• Indigenous Studies

Reference Sources

Use reference materials for background information for your topic. These are bibliographies, dictionaries, encyclopedias, guides, indexes and abstracts. You can also use reference materials to find good keywords to use when searching in databases. 

To find reference materials in Omni, perform a KEYWORD or SUBJECT search
          Example - KEYWORD search:  woman AND philosophy AND encyclopedias 
                               SUBJECT search:   ethics -- handbooks

 

Databases

• Routledge Encyclopedia of Philosophy
   

Suggested Reference Sources

• Oxford Dictionary of Philosophy /Simon Blackburn (2016) (Online) (2008 : Online) (2006 : Online)
• A Dictionary of Philosophical Terms and Names
• The Blackwell Dictionary of Western Philosophy / Nicholas Bunnin ; Jiyuan Yu (2004) (Online) (Online)
• The Blackwell Dictionary of Modern Social Thought / William Outhwaite (2008 Online) (2003: Online)
  (2003: Online) (2006: Online)
• Critical Reasoning & Philosophy: a Concise Guide to Reading, Evaluating, and Writing Philosophical Works / Mark Holowchak (2011) (Online) (Online) (Online)
• Guidelines on Reading Philosophy (Jim Pryor)