Ryan, B. F., & Joiner, B. L. (1994). Minitab handbook (3rd. ed.). Duxbury Press.
Cita Chicago (17th ed.)Ryan, Barbara F., i Brian L. Joiner. Minitab Handbook. 3rd. ed. Belmont, Calif.: Duxbury Press, 1994.
Cita MLA (8th ed.)Ryan, Barbara F., i Brian L. Joiner. Minitab Handbook. 3rd. ed. Duxbury Press, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.