Gaya APA
World Development Report 1997. (1997).
americas:
Oxford Univercity Press.
Gaya Chicago
World Development Report 1997.
.
americas:
Oxford Univercity Press,
1997.
Text.
Gaya MLA
World Development Report 1997.
.
americas:
Oxford Univercity Press,
1997.
Text.
Gaya Turabian
World Development Report 1997.
americas:
Oxford Univercity Press,
1997.
Print.