Campbell, D. T. (1981). Comment: Another perspective on a scholarly career. In M. B. Brewer & B. E. Collins (Eds.), Scientific inquiry and the social sciences: A volume in honor of Donald T. Campbell (pp. 454-501). San Francisco, CA: Jossey-Bass.
2.
Reichardt, C. S. (1998). Tribute to Donald Campbell. American Journal of Evaluation, 19, 397-398.
3.
Reichardt, C. S., & Rallis, S. F. (Eds.). (1994). The qualitative-quantitative debate: New perspectives. New directions for program evaluation, no. 61. San Francisco: Jossey-Bass.