APA
"UNITED NATIONS E. C. F. L. A., "UNITED NATIONS E. C. F. L. A., . (1969). Twentieth annual report. New: York United Nations.
Chicago
"UNITED NATIONS ECONOMIC COMMISSION FOR LATIN AMERICA.", "UNITED NATIONS ECONOMIC COMMISSION FOR LATIN AMERICA.", . 1969. Twentieth annual report. New: York United Nations.
Harvard
"UNITED NATIONS E. C. F. L. A., "UNITED NATIONS E. C. F. L. A., . (1969). Twentieth annual report. New: York United Nations.
MLA
"UNITED NATIONS ECONOMIC COMMISSION FOR LATIN AMERICA.", "UNITED NATIONS ECONOMIC COMMISSION FOR LATIN AMERICA.", . Twentieth annual report. New: York United Nations. 1969.