UN. Department of Technical Cooperation for Development. Natural Resources and Energi Division & United Nations (UN). (1989). Mining policies and planning in developing countries. UN. Department of Technical Cooperation for Development. Natural Resources and Energy Division.
Chicago Style (17. basım) AtıfUN. Department of Technical Cooperation for Development. Natural Resources and Energi Division ve United Nations (UN). Mining Policies and Planning in Developing Countries. New York: UN. Department of Technical Cooperation for Development. Natural Resources and Energy Division, 1989.
MLA (9th ed.) AtıfUN. Department of Technical Cooperation for Development. Natural Resources and Energi Division ve United Nations (UN). Mining Policies and Planning in Developing Countries. UN. Department of Technical Cooperation for Development. Natural Resources and Energy Division, 1989.