Cita APA (7th ed.)

Day, R. A., Jr, & Underwood, A. L. (1980). Quantitative analysis: Solutions to problems (Fourth Edition.). Prentice-Hall.

Cita Chicago (17th ed.)

Day, R. A., Jr, i A. L. Underwood. Quantitative Analysis: Solutions to Problems. Fourth Edition. Englewood Cliffs, New Jersey: Prentice-Hall, 1980.

Cita MLA (9th ed.)

Day, R. A., Jr, i A. L. Underwood. Quantitative Analysis: Solutions to Problems. Fourth Edition. Prentice-Hall, 1980.