APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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