Heckard, R. F., & Utts, J. M. (2007). Activities manual for mind on statistics (Third edition.). Duxbury, Thomson Brooks/Cole.
Citazione stile Chigago Style (17a edizione)Heckard, Robert F., e Jessica M. Utts. Activities Manual for Mind on Statistics. Third edition. Belmont, Calif: Duxbury, Thomson Brooks/Cole, 2007.
Citatione MLA (9a ed.)Heckard, Robert F., e Jessica M. Utts. Activities Manual for Mind on Statistics. Third edition. Duxbury, Thomson Brooks/Cole, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.