HABERMAN, S. J. (1974). The Analysis of frequency data. The University of Chicago.
Lua i Stíl Chicago (17ú heag.)HABERMAN, Shelby J. The Analysis of Frequency Data. Chicago: The University of Chicago, 1974.
Lua MLA (9ú heag.)HABERMAN, Shelby J. The Analysis of Frequency Data. The University of Chicago, 1974.
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