APA (7th ed.) Citation

Bell, J., Boardman, R., & Buckby, T. (1985). Variety: A workbook for intermediate readers (1. publ.). Cambridge Univ. Press.

Chicago Style (17th ed.) Citation

Bell, Jan, Roy Boardman, and Tony Buckby. Variety: A Workbook for Intermediate Readers. 1. publ. Cambridge u.a: Cambridge Univ. Press, 1985.

MLA (9th ed.) Citation

Bell, Jan, et al. Variety: A Workbook for Intermediate Readers. 1. publ. Cambridge Univ. Press, 1985.