APA aipamena

UNDP World Bank Water and Sanitation Program. Work Program Volume 1: Country Work Plan 1991-92.

Chicago Style aipamena

UNDP World Bank Water and Sanitation Program. Work Program Volume 1: Country Work Plan 1991-92.

MLA aipamena

UNDP World Bank Water and Sanitation Program. Work Program Volume 1: Country Work Plan 1991-92.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.