United States Agency for International Development. Office of Development Program Review and Evaluation. (1974). Project evaluation guidelines (3rd ed.). Office of Development Program Review and Evaluation, United States Agency for International Developnment.
Chicago-Zitierstil (17. Ausg.)United States Agency for International Development. Office of Development Program Review and Evaluation. Project Evaluation Guidelines. 3rd ed. Washington: Office of Development Program Review and Evaluation, United States Agency for International Developnment, 1974.
MLA-Zitierstil (9. Ausg.)United States Agency for International Development. Office of Development Program Review and Evaluation. Project Evaluation Guidelines. 3rd ed. Office of Development Program Review and Evaluation, United States Agency for International Developnment, 1974.