KOTHARI, . C. . R. (1984). Quantitative techniques. : VIKAS Publishers.
Lua i Stíl Chicago (17ú heag.)KOTHARI, C. R. Quantitative Techniques. : VIKAS Publishers, 1984.
Lua MLA (9ú heag.)KOTHARI, C. R. Quantitative Techniques. : VIKAS Publishers, 1984.
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