APA (7th ed.) Citation

O'Connor, J. D., & O'Connor, J. D. (1980). Better English pronounciation (2nd ed.). Cambridge University Press.

Chicago Style (17th ed.) Citation

O'Connor, J. D., and J. D. O'Connor. Better English Pronounciation. 2nd ed. Cambridge, England: Cambridge University Press, 1980.

MLA (9th ed.) Citation

O'Connor, J. D., and J. D. O'Connor. Better English Pronounciation. 2nd ed. Cambridge University Press, 1980.