HORTON, P. B. (1982). Personal Learning Aid For Introductory Sociology Paul B. Horton And Robert L. Horton. Dow Jones-Irwin.
Lua i Stíl Chicago (17ú heag.)HORTON, Paul B. Personal Learning Aid For Introductory Sociology Paul B. Horton And Robert L. Horton. Dow Jones-Irwin, 1982.
Lua MLA (8ú heag.)HORTON, Paul B. Personal Learning Aid For Introductory Sociology Paul B. Horton And Robert L. Horton. Dow Jones-Irwin, 1982.
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