Cita APA (7th ed.)

Spence, J. T., & Underwood, B. J. (1976). Elementary statistics (3rd ed.). Prentice-Hall.

Cita Chicago (17th ed.)

Spence, Janet T., i Benton J. Underwood. Elementary Statistics. 3rd ed. Englewood Cliffs, N.J: Prentice-Hall, 1976.

Cita MLA (9th ed.)

Spence, Janet T., i Benton J. Underwood. Elementary Statistics. 3rd ed. Prentice-Hall, 1976.