Leftwich, R. H. (1980). Economics of social issues. Business Pub..
Chicagoスタイル(17版)引用形式Leftwich, Richard H. Economics of Social Issues. Dallas: Business Pub., 1980.
MLA(9版)引用形式Leftwich, Richard H. Economics of Social Issues. Business Pub., 1980.
警告: この引用は必ずしも正確ではありません.