Cita APA

Duncan, C. P., Spence, J. T., & Underwood, B. J. (1968). Elementary Statistics. New York: Appleton-Century-Crofts.

Citación estilo Chicago

Duncan, Carl P., Janet T. Spence, y Benton J. Underwood. Elementary Statistics. New York: Appleton-Century-Crofts, 1968.

Cita MLA

Duncan, Carl P., Janet T. Spence, y Benton J. Underwood. Elementary Statistics. New York: Appleton-Century-Crofts, 1968.