APA Style

Langenegger, O. (1994). Groundwater Quality and Handpump Corrosion in West Africa . Washington DC: UNDP-World Bank Water and Sanitation Program.

MLA Style

Langenegger, Otto. "Groundwater Quality and Handpump Corrosion in West Africa". Washington DC: UNDP-World Bank Water and Sanitation Program, 1994. print.