APA (7th ed.) Citation

Foll, D., Foll, D., Kelly, A., & Kelly, A. First certificate avenues. Univ. Press.

Chicago Style (17th ed.) Citation

Foll, David, David Foll, Anne Kelly, and Anne Kelly. First Certificate Avenues. Cambridge: Univ. Press.

MLA (9th ed.) Citation

Foll, David, et al. First Certificate Avenues. Univ. Press.