APA (7th ed.) Zitazioa
Pfaffenberger, R. C. (1987). Statistical methods: For business and economics (3rd ed.). Irwin.
Chicago Style (17th ed.) Zitazioa
Pfaffenberger, Roger C. Statistical Methods: For Business and Economics. 3rd ed. Homewood: Irwin, 1987.
MLA (9th ed.) Zitazioa
Pfaffenberger, Roger C. Statistical Methods: For Business and Economics. 3rd ed. Irwin, 1987.
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