APA استشهاد

Bullen, K. E., & Bolt, B. A. (1985). Introduction to the theory of seismology. Cambridge University Press.

استشهاد بنمط شيكاغو

Bullen, K. E., و Bruce A. Bolt. Introduction to the Theory of Seismology. New York: Cambridge University Press, 1985.

MLA استشهاد

Bullen, K. E., و Bruce A. Bolt. Introduction to the Theory of Seismology. Cambridge University Press, 1985.