Gaya APA

Altaf, M, A. et al (1992). Willingness to Pay for Water in Rural Punjab, Pakistan . Washington DC: UNDP-World Bank Water and Sanitation Program.

Gaya MLA

Altaf, Mir, Anjum. et al. "Willingness to Pay for Water in Rural Punjab, Pakistan". Washington DC: UNDP-World Bank Water and Sanitation Program, 1992. print.