Dyfyniad APA
Ritzer, G. (2000). Sociological theory (5th.ed.). McGraw-Hill.
Dyfyniad Arddull Chicago
Ritzer, George. Sociological Theory. 5th.ed. New York: McGraw-Hill, 2000.
Dyfyniad MLA
Ritzer, George. Sociological Theory. 5th.ed. McGraw-Hill, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.