APA (7th ed.) Citation

De Jong, D. (1998). Groundwater: One of the most valuable natural resources. Water and Sanitation Forums.

Chicago Style (17th ed.) Citation

De Jong, Dick. "Groundwater: One of the Most Valuable Natural Resources." Water and Sanitation Forums 1998.

MLA (9th ed.) Citation

De Jong, Dick. "Groundwater: One of the Most Valuable Natural Resources." Water and Sanitation Forums, 1998.

Warning: These citations may not always be 100% accurate.