Não informado. (1977). Population Reports. Johns Hopkins University, Population Information Program.
Chicagoスタイル(17版)引用形式Não informado. Population Reports. Baltimore, Md: Johns Hopkins University, Population Information Program, 1977.
MLA(8版)引用形式Não informado. Population Reports. Johns Hopkins University, Population Information Program, 1977.
警告: この引用は必ずしも正確ではありません.