edited by Willy Sellekaerts
Macmillan, 1974
Buku Teks
edited by Warren C. Robinson
Population Council, 1975
Buku Teks
Donaldson, Loraine
N.Y. Praeger , 1966
Buku Teks
Todaro, Michael P., author
Addison-Wesley , 2000
Buku Teks
Todaro, Michael P., author
Longman, 1997
Buku Teks