Zetterberg, H. L. (1965). On theory and verification in sociology (3rd ed., enlarged.). New Jersey: The Bedmininster Press.
Παραπομπή Chicago StyleZetterberg, Hans L. On Theory and Verification in Sociology. 3rd ed., enlarged. New Jersey: The Bedmininster Press, 1965.
Παραπομπή MLAZetterberg, Hans L. On Theory and Verification in Sociology. 3rd ed., enlarged. New Jersey: The Bedmininster Press, 1965.
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