Tohutoro APA (7th ed.)

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

Tohutoru Kātū Chicago (17th ed.)

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

Tohutoro MLA (9th ed.)

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