(1974). Manual for the compilation of balances of water resources and needs. United Nations.
Cita Chicago (17th ed.)Manual for the Compilation of Balances of Water Resources and Needs. Nueva York: United Nations, 1974.
Cita MLA (9th ed.)Manual for the Compilation of Balances of Water Resources and Needs. United Nations, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.