Jelliffe, Derrick B.
Office of War on Hunger Agency for International Development , 1969
Buku Teks
editors by G. Russell Pipe; A.A.M. Veenhuis
North-Holland Publishing Company, 1975
Buku Teks
Cuca, Roberto
John Hopkins University Press, 1977
Buku Teks
Bee, Helen L.
Allyn and Bacon, 2010
Buku Teks
The population council, 1977
Buku Teks