Cita APA

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

Chicago Edition Citation

Day, R. A., i A. L. Underwood. Quantitative Analysis. 6th ed. Englewood Cliffs, N.J.: Prentice Hall, 1991.

Cita MLA

Day, R. A., i A. L. Underwood. Quantitative Analysis. 6th ed. Prentice Hall, 1991.