Sprowls, R. C. (1955). Elementary statistics for students of social science and business. McGraw-Hill.
Citace podle Chicago (17th ed.)Sprowls, R. Clay. Elementary Statistics for Students of Social Science and Business. New York: McGraw-Hill, 1955.
Citace podle MLA (9th ed.)Sprowls, R. Clay. Elementary Statistics for Students of Social Science and Business. McGraw-Hill, 1955.
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