Παραπομπή APA

(1981). Drinking-water and sanitation, 1981-1990: A way to health. Geneva: World Health Organization.

Παραπομπή Chicago Style

Drinking-water and Sanitation, 1981-1990: A Way to Health. Geneva: World Health Organization, 1981.

Παραπομπή MLA

Drinking-water and Sanitation, 1981-1990: A Way to Health. Geneva: World Health Organization, 1981.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.