Day, R. A. J. (1980). Quantitative analysis (4th ed.). Prentice Hall.
Cita Chicago (17th ed.)Day, Reuben Alexander Jr. Quantitative Analysis. 4th ed. New York: Prentice Hall, 1980.
Cita MLA (9th ed.)Day, Reuben Alexander Jr. Quantitative Analysis. 4th ed. Prentice Hall, 1980.
Atenció: Aquestes cites poden no estar 100% correctes.