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.
Chicago-viite (17. p.)Park, Robert Ezra, ja 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.
MLA-viite (8. p.)Park, Robert Ezra, ja 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.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.