Citazione Stile APA (7a Edizione)

Day, R. A., & Underwood, A. L. 1. (1991). Quantitative analysis (6th ed.). Prentice Hall Intenational.

Citazione stile Chigago Style (17a edizione)

Day, Reuben Alexander, e Arthur Louis 1924 Underwood. Quantitative Analysis. 6th ed. Englewooe Cliffs, NJ: Prentice Hall Intenational, 1991.

Citatione MLA (9a ed.)

Day, Reuben Alexander, e Arthur Louis 1924 Underwood. Quantitative Analysis. 6th ed. Prentice Hall Intenational, 1991.