U.S. Department of commerce. (1980). World population 1979.
Chicagoスタイル(17版)引用形式U.S. Department of commerce. World Population 1979. 1980.
MLA(9版)引用形式U.S. Department of commerce. World Population 1979. 1980.
警告: この引用は必ずしも正確ではありません.
APA(7版)引用形式