One of the most useful books I purchased as part of my doctoral program at Capella University is Research Design: Qualitative, Quantitative, and Mixed Methods Approaches (2nd Edition). Though I rely heavily on several of the chapters when embarking on a new research project, the one I come back to most often is Chapter 6: The Purpose Statement. Creswell shares “scripts” that can be adapted for qualitative, quantitative and mixed-methods approaches.
Below is a PPT (created by Chris Anderson) that I discovered at DocStoc today. You can view the slides here at my blog, or visit Chris’ page at DocStoc to download or print the presentation.