Additional information about the ethical issues in service-learning research can be obtained through the following publications:
Chapdelaine, A., Ruiz, A., Warchal, J., & Wells, C. (2005). Service-learning code of ethics. Bolton, MA: Anker Publishing Co.
http://www.josseybass.com/WileyCDA/WileyTitle/productCd-1882982835.html
Wells, C., Warchal, J., Ruiz, A., & Chapdelain, A. (in press). Ethical issues in research on international service learning. In R. G. Bringle, J. A. Hatcher, & S. G. Jones, (Eds.), International service learning: Conceptual frameworks and research. Sterling, VA: Stylus.