APA (7th ed.) Citation

Berlin, I., Hardy, H., & Harris, I. (2002). Liberty: Incorporating four essays on liberty. Oxford University Press.

Chicago Style (17th ed.) Citation

Berlin, Isaiah, Henry Hardy, and Ian Harris. Liberty: Incorporating Four Essays on Liberty. Oxford University Press, 2002.

MLA (9th ed.) Citation

Berlin, Isaiah, et al. Liberty: Incorporating Four Essays on Liberty. Oxford University Press, 2002.