Dyfyniad APA
Schiller, B. R., Hill, C. D., & Wall, S. L. (2013). The economy today (13th ed.). McGraw-Hill Irwin.
Dyfyniad Arddull Chicago
Schiller, Bradley R., Cynthia D. Hill, and Sherri L. Wall. The Economy Today. 13th ed. New York: McGraw-Hill Irwin, 2013.
Dyfyniad MLA
Schiller, Bradley R., et al. The Economy Today. 13th ed. McGraw-Hill Irwin, 2013.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.