Não informado. (1981). Balance of Payments Statistics Yearbook. International Monetary Fund.
Chicagoスタイル(17版)引用形式Não informado. Balance of Payments Statistics Yearbook. Washington: International Monetary Fund, 1981.
MLA(8版)引用形式Não informado. Balance of Payments Statistics Yearbook. International Monetary Fund, 1981.
警告: この引用は必ずしも正確ではありません.