这本开创了定性、定量和混合方法研究设计比较的畅销书，在第四版中继续帮助学生和研究人员为学术期刊文章、学位论文或毕业论文准备计划或提案。

The bestseller that pioneered the comparison of qualitative, quantitative, and mixed methods research design continues in its Fourth Edition to help students and researchers prepare their plan or proposal for a scholarly journal article, dissertation or thesis.