Witte, R. S. (1993). Student workbook to accompany statistics (4th.ed.). HBJ.
Chicago Style (17. basım) AtıfWitte, Robert S. Student Workbook to Accompany Statistics. 4th.ed. Orlando: HBJ, 1993.
MLA (9th ed.) AtıfWitte, Robert S. Student Workbook to Accompany Statistics. 4th.ed. HBJ, 1993.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..