WORLD BANK. (1991). WORLD DEVELOPMENT REPORT 1991: THE CHALLENGE OF DEVELOPMENT. OXFORD UNIVERSITY PRESS.
Chicago-referens (17:e uppl.)WORLD BANK. WORLD DEVELOPMENT REPORT 1991: THE CHALLENGE OF DEVELOPMENT. NEW DELHI GENEVA: OXFORD UNIVERSITY PRESS, 1991.
MLA-referens (9:e uppl.)WORLD BANK. WORLD DEVELOPMENT REPORT 1991: THE CHALLENGE OF DEVELOPMENT. OXFORD UNIVERSITY PRESS, 1991.
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