The SAGE Handbook of Social Media Research Methods (2016) is a treasure trove of chapters on designing and conducting quantitative or qualitative research, analyzing and using data from social media.
Download book chapters as PDFs. You might even read my chapter: Chapter 12 | Using Social Media in Data Collection: Designing Studies with the Qualitative E-Research Framework.
Sloan, L. & Quan-Haase, A. (2016). The SAGE Handbook of social media research methods 55 City Road, London: SAGE Publications Ltd doi: 10.4135/9781473983847