Vella, J. K., & Ashworth, J. (2008). On teaching and learning: Putting the principles and practices of dialogue education into action (First edition.). Jossey-Bass.

Vella, Jane Kathryn, and Joanna Ashworth. On Teaching and Learning: Putting the Principles and Practices of Dialogue Education into Action. First edition. San Francisco, California: Jossey-Bass, 2008.

Vella, Jane Kathryn, and Joanna Ashworth. On Teaching and Learning: Putting the Principles and Practices of Dialogue Education into Action. First edition. Jossey-Bass, 2008.