CROXTON, F. E. (1974). Practical Business Statistics Frederick E. Croxton, Dudley J. Cowden Dan Ben W. Bolch. Prentice Hall of India.
Lua i Stíl Chicago (17ú heag.)CROXTON, Frederick E. Practical Business Statistics Frederick E. Croxton, Dudley J. Cowden Dan Ben W. Bolch. Prentice Hall of India, 1974.
Lua MLA (8ú heag.)CROXTON, Frederick E. Practical Business Statistics Frederick E. Croxton, Dudley J. Cowden Dan Ben W. Bolch. Prentice Hall of India, 1974.
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