Cita APA (7th ed.)
Day, R. A., & Underwood, A. L. (1967). Quantitative analysis (2d ed.). Prentice Hall.
Cita Chicago (17th ed.)
Day, R. A., i A. L. Underwood. Quantitative Analysis. 2d ed. New Jersey: Prentice Hall, 1967.
Cita MLA (9th ed.)
Day, R. A., i A. L. Underwood. Quantitative Analysis. 2d ed. Prentice Hall, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.