APA (7th ed.) Zitazioa

Leftwich, R. H. (1980). Economics of social issues. Business Pub..

Chicago Style (17th ed.) Zitazioa

Leftwich, Richard H. Economics of Social Issues. Dallas: Business Pub., 1980.

MLA (9th ed.) Zitazioa

Leftwich, Richard H. Economics of Social Issues. Business Pub., 1980.