APA (7th ed.) Citation

Hale, J. R., Highfield, J. R. L., & Smalley, B. (1965). Europe in the late Middle Ages. Faber and Faber.

Chicago Style (17th ed.) Citation

Hale, J. R., J. R. L. Highfield, and Beryl Smalley. Europe in the Late Middle Ages. London: Faber and Faber, 1965.

MLA (9th ed.) Citation

Hale, J. R., et al. Europe in the Late Middle Ages. Faber and Faber, 1965.