Caiden, Naomi
Planning and budgeting in poor countries
John Wiley & Sons, 1974
Buku Teks
Rostow, Walt Whitman
Rich countries and poor countries : reflections on the past, lessons for the future
Westview Press, 1987
Buku Teks
A study of contemporary Ghana Volume II : some aspects of social structure / edited, Walter Birmingham
Northwestern University Press, 1967
Buku Teks
Pechman, Joseph A.
Tax reform, the rich and poor
Harvester Wheatsheaf, 1989
Buku Teks
Ward, Barbara
The rich nations and the poor nations
W.W. Norton, 1962
Buku Teks