Dyfyniad APA

Leftwich, R. H. (1976). Economics of social issues. Business.

Dyfyniad Arddull Chicago

Leftwich, Richard H. Economics of Social Issues. Dallas: Business, 1976.

Dyfyniad MLA

Leftwich, Richard H. Economics of Social Issues. Business, 1976.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.