Schaefer, R. T. (2008). Sociology (11th ed.). McGraw-Hill.
Chicago Style aipamenaSchaefer, Richard T. Sociology. 11th ed. Boston: McGraw-Hill, 2008.
MLA aipamenaSchaefer, Richard T. Sociology. 11th ed. McGraw-Hill, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.