APA (7th ed.) Citation

Bell, J., Boardman, R., & Buckby, T. (1985). Variety: A workbook for intermediate readers. Cambridge University Press.

Chicago Style (17th ed.) Citation

Bell, Jan, Roy Boardman, and Tony Buckby. Variety: A Workbook for Intermediate Readers. Cambridge: Cambridge University Press, 1985.

MLA (9th ed.) Citation

Bell, Jan, et al. Variety: A Workbook for Intermediate Readers. Cambridge University Press, 1985.