Guerra-López, I. (2007). Evaluating impact: Evaluation and continual improvement for performance improvement practitioners. HDR Press.
Lua i Stíl Chicago (17ú heag.)Guerra-López, Ingrid. Evaluating Impact: Evaluation and Continual Improvement for Performance Improvement Practitioners. Amherst, Mass.: HDR Press, 2007.
Lua MLA (9ú heag.)Guerra-López, Ingrid. Evaluating Impact: Evaluation and Continual Improvement for Performance Improvement Practitioners. HDR Press, 2007.
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