Obeng, L. A. (1987). The co-composting of domestic solid and human wastes. World Bank.
Chicago Style (17. basım) AtıfObeng, Letitia A. The Co-composting of Domestic Solid and Human Wastes. Washington: World Bank, 1987.
MLA (9th ed.) AtıfObeng, Letitia A. The Co-composting of Domestic Solid and Human Wastes. World Bank, 1987.
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