Elifson, K. (1990). Fundamentals of social statistics (2nd.ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Elifson, Kirk. Fundamentals of Social Statistics. 2nd.ed. Boston: McGraw-Hill, 1990.
Lua MLA (9ú heag.)Elifson, Kirk. Fundamentals of Social Statistics. 2nd.ed. McGraw-Hill, 1990.
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