1. Barrows, H. S., & Tamblyn, R. (1980). Problem-based learning: An approach to medical learning. Springer.
2. Barrows, H. S. (1986). A taxonomy of problem-based learning methods. Medical Education, 20, 481–486.
3. Barrows, H. S. (1992). The tutorial process. Southern Illinois University Press.
4. Barrows, H. S. (1996). Problem-based learning in medicine and beyond. New Directions for Teaching and Learning, 68, 3–12.
5. Bereiter, C., & Scardamalia, M. (1989). Intentional learning as a goal of instruction. In L. Resnick (Ed.), Knowing, learning and instruction: Essays in honor of Robert Glaser (pp. 361–392). Lawrence Erlbaum Associates.