APA (7th ed.) Citation

Bullen, K. E. (1963). An introduction to the theory of seismology (3rd ed.). Cambridge University Press.

Chicago Style (17th ed.) Citation

Bullen, K. E. An Introduction to the Theory of Seismology. 3rd ed. Cambridge: Cambridge University Press, 1963.

MLA (9th ed.) Citation

Bullen, K. E. An Introduction to the Theory of Seismology. 3rd ed. Cambridge University Press, 1963.