Dyfyniad APA

Zimbardo, P. G., & Boyd, J. (2009). The time paradox: The new psychology of time that can change your life (Primera edición.). Free Press.

Dyfyniad Arddull Chicago

Zimbardo, Philip G., and John Boyd. The Time Paradox: The New Psychology of Time That Can Change Your Life. Primera edición. New York: Free Press, 2009.

Dyfyniad MLA

Zimbardo, Philip G., and John Boyd. The Time Paradox: The New Psychology of Time That Can Change Your Life. Primera edición. Free Press, 2009.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.