The sixth edition of Research Design: Qualitative, Quantitative, and Mixed Methods Approaches offers structured guidance for designing research projects and proposals. The authors systematically present qualitative, quantitative, and mixed methods approaches, enabling researchers to align methodology with their research questions. The text covers each stage of the research process, from literature review to hypothesis formulation and study design. This revised edition incorporates updated APA 7th guidelines, inclusive language, and recent developments in mixed methods research.