Park, R. E., & Burgess, E. W. (1969). Introduction to the science of sociology: Including the original index to basic sociological concepts (3d ed. rev.). University of Chicago Press.
Lua i Stíl Chicago (17ú heag.)Park, Robert Ezra, agus Ernest Watson Burgess. Introduction to the Science of Sociology: Including the Original Index to Basic Sociological Concepts. 3d ed. rev. Chicago: University of Chicago Press, 1969.
Lua MLA (8ú heag.)Park, Robert Ezra, agus Ernest Watson Burgess. Introduction to the Science of Sociology: Including the Original Index to Basic Sociological Concepts. 3d ed. rev. University of Chicago Press, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.