Cita APA (7a ed.)

Sharp, A. M. (2008). Economics of social issues (18th ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Sharp, Ansel M. Economics of Social Issues. 18th ed. Boston: McGraw-Hill, 2008.

Cita MLA (9a ed.)

Sharp, Ansel M. Economics of Social Issues. 18th ed. McGraw-Hill, 2008.