Secrist, H. (1920). Statistics in business: Their analysis, charting and use. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Secrist, Horace. Statistics in Business: Their Analysis, Charting and Use. New York: McGraw-Hill, 1920.
Lua MLA (8ú heag.)Secrist, Horace. Statistics in Business: Their Analysis, Charting and Use. McGraw-Hill, 1920.
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