Gaya APA

Blackett, I, C. (1994). Low-cost Urban Sanitation in Lesotho . Washington DC: UNDP-World Bank Water \r Sanitation Program.

Gaya MLA

Blackett, Isabel, C.. "Low-cost Urban Sanitation in Lesotho". Washington DC: UNDP-World Bank Water \r Sanitation Program, 1994. print.