Leftwich, R. H. (1976). Economics of social issues. Business.
Chicagoスタイル(17版)引用形式Leftwich, Richard H. Economics of Social Issues. Dallas: Business, 1976.
MLA(9版)引用形式Leftwich, Richard H. Economics of Social Issues. Business, 1976.
警告: この引用は必ずしも正確ではありません.