Dyfyniad APA

Sharp, A. M., Register, C. A., & Leftwich, R. H. (1988). Economics of social issues (8th ed.). BPI/Irwin.

Dyfyniad Arddull Chicago

Sharp, Ansel Miree, Charles A. Register, and Richard H. Leftwich. Economics of Social Issues. 8th ed. Homewood, IL: BPI/Irwin, 1988.

Dyfyniad MLA

Sharp, Ansel Miree, et al. Economics of Social Issues. 8th ed. BPI/Irwin, 1988.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.