Cita APA (7th ed.)

Leftwich, R. H. (1984). Economics of social issues (6th ed.). Business Publications, Inc..

Cita Chicago (17th ed.)

Leftwich, Richard H. Economics of Social Issues. 6th ed. Austin, Texas: Business Publications, Inc., 1984.

Cita MLA (9th ed.)

Leftwich, Richard H. Economics of Social Issues. 6th ed. Business Publications, Inc., 1984.