Cita APA (7th ed.)

Leftwich, R. H., & Sharp, A. M. (1980). Economics of social issues (4th ed.). Business Publications.

Cita Chicago (17th ed.)

Leftwich, R. H., i A. M. Sharp. Economics of Social Issues. 4th ed. USA: Business Publications, 1980.

Cita MLA (9th ed.)

Leftwich, R. H., i A. M. Sharp. Economics of Social Issues. 4th ed. Business Publications, 1980.