Clark, A. W. (1983). Social science: Introduction to theory and method. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Clark, Alfred W. Social Science: Introduction to Theory and Method. Sydney: Prentice-Hall, 1983.
Lua MLA (9ú heag.)Clark, Alfred W. Social Science: Introduction to Theory and Method. Prentice-Hall, 1983.
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