Cita APA (7th ed.)

Day, R. A., & Underwood, A. (1986). Quantitative analysis (5th ed.). Prentice Hall.

Cita Chicago (17th ed.)

Day, R. A., i A.L Underwood. Quantitative Analysis. 5th ed. Englewood Cliffs, N.J: Prentice Hall, 1986.

Cita MLA (9th ed.)

Day, R. A., i A.L Underwood. Quantitative Analysis. 5th ed. Prentice Hall, 1986.