Cita APA (7a ed.)

Sharp, A. M., Register, C. A., & Grimes, P. W. (2013). Economics of social issues (Twentieth edition.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Sharp, Ansel Miree, Charles A. Register, y Paul W. Grimes. Economics of Social Issues. Twentieth edition. New York: McGraw-Hill, 2013.

Cita MLA (9a ed.)

Sharp, Ansel Miree, et al. Economics of Social Issues. Twentieth edition. McGraw-Hill, 2013.