Cita APA (7th ed.)
Pfaffenberger, R. C. (1987). Statistical methods: For business and economics (3rd ed.). Irwin.
Cita Chicago (17th ed.)
Pfaffenberger, Roger C. Statistical Methods: For Business and Economics. 3rd ed. Homewood: Irwin, 1987.
Cita MLA (9th ed.)
Pfaffenberger, Roger C. Statistical Methods: For Business and Economics. 3rd ed. Irwin, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.