One of the most important steps in research is to select the appropriate database for your topic. There are many different kinds of databases out there but you're looking for a bibliographic-type resource that covers the literature of a field. The following databases provide comprehensive coverage for urban studies.
The following newspaper sources can help you gain an understanding of urban events:
The following reference works can help you gain a basic understanding of key terms and ideas in your topic. They are also a great resource to learn search terms for your research.