APA-referens (7:e uppl.)

Não informado. (1981). Balance of Payments Statistics Yearbook. International Monetary Fund.

Chicago-referens (17:e uppl.)

Não informado. Balance of Payments Statistics Yearbook. Washington: International Monetary Fund, 1981.

MLA-referens (8:e uppl.)

Não informado. Balance of Payments Statistics Yearbook. International Monetary Fund, 1981.

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