
For resources on research methods in general, take a look at 'Sage Research Methods':
SAGE Research Methods contains more than 1000 books, reference works, journal articles, and instructional videos by world-leading academics from across the social sciences. It supports research at all levels and across all subjects by providing material to guide users through every step of the research process. Also includes cases, datasets, data analysis and materials on data visualization, qualitative and quantitative research methods, statistical methods and statistical packages such as Python, R and SPSS among others.