Is your topic in a particular subject area?  Which electronic database you use depends on your topic.

If so, use a subject database. Subject databases specialize in a particular subject, and the articles indexed are generally from scholarly sources. Examples of subject databases and the kinds of articles they identify are:

ABI/INFORM®	indexes articles in business-related subjects such as management, finance, and advertising
Engineering Village	indexes engineering articles and conference proceedings
PsycINFO	indexes journal articles and book chapters in psychology