Freund, J. E., & Williams, J. F. P. (1970). Modern Business Statistics (2nd ed.). Pitman.
Čikaški stil citiranjaFreund, John E., i J. Frank Perles Williams. Modern Business Statistics. 2nd ed. London: Pitman, 1970.
MLA način citiranjaFreund, John E., i J. Frank Perles Williams. Modern Business Statistics. 2nd ed. Pitman, 1970.
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