Roche, C. (1999). Impact assessment for development agencies: Learning to value change. Oxfam.
Cita Chicago (17th ed.)Roche, Chris. Impact Assessment for Development Agencies: Learning to Value Change. Oxford: Oxfam, 1999.
Cita MLA (8th ed.)Roche, Chris. Impact Assessment for Development Agencies: Learning to Value Change. Oxfam, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.