APA (7th ed.) Citation

Bullen, K. E., & Bolt, B. A. (1985). An introduction to the theory of seismology (4th ed.). Cambridge University Press.

Chicago Style (17th ed.) Citation

Bullen, K. E., and Bruce A. Bolt. An Introduction to the Theory of Seismology. 4th ed. Cambridge, UK: Cambridge University Press, 1985.

MLA (9th ed.) Citation

Bullen, K. E., and Bruce A. Bolt. An Introduction to the Theory of Seismology. 4th ed. Cambridge University Press, 1985.