Gaya APA
Population,employment and income. (1988).
[s.n.]:
FAO.
Gaya Chicago
Population,employment and income.
.
[s.n.]:
FAO,
1988.
.
Gaya MLA
Population,employment and income.
.
[s.n.]:
FAO,
1988.
.
Gaya Turabian
Population,employment and income.
[s.n.]:
FAO,
1988.
.