APA (7th ed.) Citation

Barnes, D., Barnes, D. R., & Clarke, S. (1984). Versions of English. Heinemann Educational Books.

Chicago Style (17th ed.) Citation

Barnes, Dorothy, Douglas R. Barnes, and Stephen Clarke. Versions of English. London ; Exeter, N.H.: Heinemann Educational Books, 1984.

MLA (9th ed.) Citation

Barnes, Dorothy, et al. Versions of English. Heinemann Educational Books, 1984.