Kolb, D. (1984). Experiential learning. New York: Prentice Hall.
Moon, J. (1999). Reflection in Learning and Professional Development. London: Routledge.
Moon, J. (2004). A Handbook of Reflective and Experiential Learning: Theory and Practice. London: RoutledgeFalmer
Moon, J. (2006). Learning Journals: A Handbook for Academics, Students and Professional Development. London: Routledge
Schon, D.A. (1991). The reflective practitioner. New York: Basic Books.
Wikipedia lists different terms to represent reflection (under psychology: introspection, contemplation, debriefing, or observation)
Internet Encyclopedia of Philosophy entry on Introspection
Dr. Barrett's Reflection weblinks on del.icio.us
Scaffolding Reflection with Adolescent and Adult Learners
Learning and Assessing Through Reflection: A Practical Guide (PDF) www.practicebasedlearning.org
Service Learning Reflection Activities (PDF)
Reflection Toolkit (PDF), Northwest Service Academy, Metro Center, Portland, OR: www.northwestserviceacademy.org
Reflection and The Experiential Learning Cycle (PDF), Career & Community Learning Center, University of Minnesota
Facilitating Reflection: A Manual for Leaders and Educators. University of Vermont
Writing Portfolios: What Teachers Learn from Student Self-Assessment by Kim Johnson-Bogart
"Examples from students' self-reflective essays, created to organize and explain their selections for end-of-term writing portfolios, reveal how much students learn from such reflection. Careful attention to students' reflections invites instructors to change their approach so that it encourages the process of learning that students describe."Karen Barnstable's blog with great resources on reflection and developing Career transition portfolios.
Edutopia article: High Tech Reflection Strategies Make Learning Stick