Hughes, M. D., Kroehler, C. J., & Vander Zanden, J. W. (2009). Sociology: The core (9th, international ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Hughes, Michael D., Carolyn J. Kroehler, agus James Wilfrid Vander Zanden. Sociology: The Core. 9th, international ed. Boston: McGraw-Hill, 2009.
Lua MLA (9ú heag.)Hughes, Michael D., et al. Sociology: The Core. 9th, international ed. McGraw-Hill, 2009.
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