Smith, R. W., & Preston, F. W. (1982). Sociology: An introduction (2nd ed.). St. Martin's.
Lua i Stíl Chicago (17ú heag.)Smith, Ronald W., agus Frederick W. Preston. Sociology: An Introduction. 2nd ed. New York: St. Martin's, 1982.
Lua MLA (9ú heag.)Smith, Ronald W., agus Frederick W. Preston. Sociology: An Introduction. 2nd ed. St. Martin's, 1982.
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