APA (7th ed.) Citation

Richards, J. C., & Long, M. N. (1984). Breakthrough 2: A course in English communication practice (2nd ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Richards, Jack C., and M. N. Long. Breakthrough 2: A Course in English Communication Practice. 2nd ed. Oxford: Oxford University Press, 1984.

MLA (9th ed.) Citation

Richards, Jack C., and M. N. Long. Breakthrough 2: A Course in English Communication Practice. 2nd ed. Oxford University Press, 1984.