Dyfyniad APA
Schaefer, R. T., & Lamm, R. P. (1989). Sociology (3rd ed.). McGraw-Hill.
Dyfyniad Arddull Chicago
Schaefer, Richard T., and Robert P. Lamm. Sociology. 3rd ed. New York: McGraw-Hill, 1989.
Dyfyniad MLA
Schaefer, Richard T., and Robert P. Lamm. Sociology. 3rd ed. McGraw-Hill, 1989.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.