Cita APA (7a ed.)

Berlin, I., Hardy, H., & Williams, B. A. O. Concepts and categories: Philosophical essays / Isaiah Berlin ; ed. by Henry Hardy ; with an introd. by Bernard Williams.

Cita Chicago Style (17a ed.)

Berlin, Isaiah, Henry Hardy, y Bernard Arthur Owen Williams. Concepts and Categories: Philosophical Essays / Isaiah Berlin ; Ed. by Henry Hardy ; with an Introd. by Bernard Williams. London.

Cita MLA (8a ed.)

Berlin, Isaiah, et al. Concepts and Categories: Philosophical Essays / Isaiah Berlin ; Ed. by Henry Hardy ; with an Introd. by Bernard Williams.