Literature on research methods can be found in books and journal articles, so searching in the library catalog and databases will turn up relevant sources. In the library catalog, some relevant classifications include Social service -- Research -- Methodology; Social service -- Research; Social sciences -- Research -- Methodology; Social service -- Statistical methods; or Social sciences -- Statistical methods.
Many publishers distribute books on research methods and Sage is among the most prolific. The library now subscribes to the database Sage Research Methods which provides a database devoted specifically to the research methods literature.