APA
"United Nations . E. A. S. A. (. O., "United Nations . E. A. S. A. (. O., . (1973). Ground water in Africa. New: York United Nations U S A.
Chicago
"United Nations Economic And Social Affairs (Deptt Of-)", "United Nations Economic And Social Affairs (Deptt Of-)", . 1973. Ground water in Africa. New: York United Nations U S A.
Harvard
"United Nations . E. A. S. A. (. O., "United Nations . E. A. S. A. (. O., . (1973). Ground water in Africa. New: York United Nations U S A.
MLA
"United Nations Economic And Social Affairs (Deptt Of-)", "United Nations Economic And Social Affairs (Deptt Of-)", . Ground water in Africa. New: York United Nations U S A. 1973.
