1. Research design: qualitative, quantitative, and mixed methods approaches Creswell, John W., Los Angeles, California ; SAGE Publications, Inc., [2023] SW510 PSY510 CP607 SOC221
2. Qualitative inquiry & research design: choosing among five approaches Creswell, John W, Thousand Oaks, California : Sage, [2025] SOC221
3. Research design and methods: a process approach Bordens, Kenneth S., New York : McGraw-Hill, [2022] ECON350
4. Research design in clinical psychology Kazdin, Alan E., Cambridge, United Kingdom ; Cambridge University Press, 2024. CP516
5. Educational research: quantitative, qualitative, and mixed approaches Johnson, Burke, Thousand Oaks, California : SAGE Publications, Inc., [2020] ADS310
