APA استشهاد

Beth, T., & Beth, T. J. (1993). Design theory. Cambridge University Press.

استشهاد بنمط شيكاغو

Beth, Thomas, و Thomas; Jungnickel Beth. Design Theory. Cambridge [Cambridgeshire] ; New York: Cambridge University Press, 1993.

MLA استشهاد

Beth, Thomas, و Thomas; Jungnickel Beth. Design Theory. Cambridge University Press, 1993.