Dyfyniad APA
Schiller, B. R. (1994). The economy today (6th ed.). Mcgraw-Hill.
Dyfyniad Arddull Chicago
Schiller, Bradley R. The Economy Today. 6th ed. New York: Mcgraw-Hill, 1994.
Dyfyniad MLA
Schiller, Bradley R. The Economy Today. 6th ed. Mcgraw-Hill, 1994.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.