APA način citiranja (7. izdanje)

Obeng, L. A. (1987). The co-composting of domestic solid and human wastes. World Bank.

Čikaški stil citiranja (17. izdanje)

Obeng, Letitia A. The Co-composting of Domestic Solid and Human Wastes. Washington: World Bank, 1987.

MLA način citiranja (9. izdanje)

Obeng, Letitia A. The Co-composting of Domestic Solid and Human Wastes. World Bank, 1987.